diff --git a/frontend/composables/useBovineColumns.ts b/frontend/composables/useBovineColumns.ts
new file mode 100644
index 0000000..bdb228b
--- /dev/null
+++ b/frontend/composables/useBovineColumns.ts
@@ -0,0 +1,47 @@
+import { computed } from 'vue'
+import { useAuthStore } from '~/stores/auth'
+
+export interface BovineColumn {
+    key: string
+    label: string
+    width?: string
+}
+
+/**
+ * Définition partagée des colonnes des tableaux bovins (inventory + case).
+ * Deux définitions distinctes admin/user pour pouvoir ajuster les largeurs
+ * indépendamment selon le contexte.
+ */
+export const useBovineColumns = () => {
+    const auth = useAuthStore()
+
+    const adminColumns: BovineColumn[] = [
+        { key: 'nationalNumber', label: 'N° National', width: '80px' },
+        { key: 'workNumber', label: 'N° Travail', width: '60px' },
+        { key: 'sex', label: 'Sexe', width: '70px' },
+        { key: 'birthDate', label: 'Né le', width: '72px' },
+        { key: 'age', label: 'Age', width: '110px' },
+        { key: 'breedCode', label: 'Race', width: '70px' },
+        { key: 'buildingCase.building.label', label: 'Bâtiment', width: '1fr' },
+        { key: 'buildingCase.caseNumber', label: 'Case', width: '42px' },
+        { key: 'arrivalDate', label: 'Entrée le', width: '90px' },
+        { key: 'pricePerKg', label: 'Prix/kg', width: '65px' },
+        { key: 'finalPrice', label: 'Prix total', width: '100px' }
+    ]
+
+    const userColumns: BovineColumn[] = [
+        { key: 'nationalNumber', label: 'N° National', width: '80px' },
+        { key: 'workNumber', label: 'N° Travail', width: '60px' },
+        { key: 'sex', label: 'Sexe', width: '70px' },
+        { key: 'birthDate', label: 'Né le', width: '72px' },
+        { key: 'age', label: 'Age', width: '110px' },
+        { key: 'breedCode', label: 'Race', width: '70px' },
+        { key: 'buildingCase.building.label', label: 'Bâtiment', width: '1fr' },
+        { key: 'buildingCase.caseNumber', label: 'Case', width: '42px' },
+        { key: 'arrivalDate', label: 'Entrée le', width: '90px' }
+    ]
+
+    const columns = computed<BovineColumn[]>(() => auth.isAdmin ? adminColumns : userColumns)
+
+    return { columns }
+}
diff --git a/frontend/pages/infrastructure/case.vue b/frontend/pages/infrastructure/case.vue
index 7479157..9306352 100644
--- a/frontend/pages/infrastructure/case.vue
+++ b/frontend/pages/infrastructure/case.vue
@@ -33,7 +33,22 @@
             </NuxtLink>
         </div>
 
-        <div class="mt-8 mb-16">
+        <div class="flex flex-wrap gap-3 mt-4">
+            <div class="flex items-center gap-3 rounded-md bg-red-500 px-4 py-2">
+                <span class="text-2xl font-bold text-white">{{ stats.over24 }}</span>
+                <span class="text-sm uppercase tracking-wide text-white">≥ 24 mois</span>
+            </div>
+            <div class="flex items-center gap-3 rounded-md bg-orange-500 px-4 py-2">
+                <span class="text-2xl font-bold text-white">{{ stats.between22And24 }}</span>
+                <span class="text-sm uppercase tracking-wide text-white">22 – 24 mois</span>
+            </div>
+            <div class="flex items-center gap-3 rounded-md bg-yellow-500 px-4 py-2">
+                <span class="text-2xl font-bold text-white">{{ stats.between20And22 }}</span>
+                <span class="text-sm uppercase tracking-wide text-white">20 – 22 mois</span>
+            </div>
+        </div>
+
+        <div class="mt-6 mb-16">
             <UiDataTable
                 v-model:page="page"
                 v-model:per-page="perPage"
@@ -41,7 +56,6 @@
                 :items="items"
                 :total-items="totalItems"
                 :loading="loading"
-                :row-class="rowClass"
                 :row-clickable="auth.isAdmin"
                 empty-message="Aucun bovin dans cette case."
                 @row-click="goToBovine"
@@ -100,7 +114,12 @@
                     {{ formatDate(item.birthDate) }}
                 </template>
                 <template #cell-age="{ item }">
-                    {{ formatAgeLabel(item.ageMonths) }}
+                    <span
+                        class="inline-block rounded px-2 py-0.5 font-semibold"
+                        :class="ageBadgeClass(item.ageMonths)"
+                    >
+                        {{ formatAgeLabel(item.ageMonths) }}
+                    </span>
                 </template>
                 <template #cell-arrivalDate="{ item }">
                     {{ formatDate(item.arrivalDate) }}
@@ -127,7 +146,8 @@ import type { BuildingCaseData } from '~/services/dto/building-case-data'
 import type { BovineData } from '~/services/dto/bovine-data'
 import { useAuthStore } from '~/stores/auth'
 import { useDataTableServerState } from '~/composables/useDataTableServerState'
-import { formatAgeLabel } from '~/utils/bovine-age'
+import { useBovineColumns } from '~/composables/useBovineColumns'
+import { formatAgeLabel, ageBadgeClass } from '~/utils/bovine-age'
 
 const route = useRoute()
 const router = useRouter()
@@ -140,6 +160,34 @@ const hasCaseId = computed(() => Number.isFinite(caseId.value) && caseId.value >
 
 const buildingCase = ref<BuildingCaseData | null>(null)
 
+interface InventoryStats {
+    total: number
+    over24: number
+    between22And24: number
+    between20And22: number
+}
+
+const stats = ref<InventoryStats>({
+    total: 0,
+    over24: 0,
+    between22And24: 0,
+    between20And22: 0
+})
+
+const loadStats = async () => {
+    if (!hasCaseId.value) {
+        stats.value = { total: 0, over24: 0, between22And24: 0, between20And22: 0 }
+        return
+    }
+    try {
+        stats.value = await api.get<InventoryStats>('bovines/inventory-stats', {
+            buildingCaseId: caseId.value
+        }, { toast: false })
+    } catch {
+        // silencieux
+    }
+}
+
 const { items, totalItems, page, perPage, filters, loading, reload } =
     useDataTableServerState<BovineData>(
         'bovines',
@@ -186,19 +234,7 @@ const singleDateFilter = (afterKey: string, beforeKey: string) =>
 const arrivalDateFilter = singleDateFilter('arrivalDate[after]', 'arrivalDate[strictly_before]')
 const birthDateFilter = singleDateFilter('birthDate[after]', 'birthDate[strictly_before]')
 
-const columns = [
-    { key: 'nationalNumber', label: 'N° National', width: '80px' },
-    { key: 'workNumber', label: 'N° Travail', width: '43px' },
-    { key: 'sex', label: 'Sexe', width: '70px' },
-    { key: 'birthDate', label: 'Né le', width: '72px' },
-    { key: 'age', label: 'Age', width: '110px' },
-    { key: 'breedCode', label: 'Race', width: '70px' },
-    { key: 'buildingCase.building.label', label: 'Bâtiment', width: '75px' },
-    { key: 'buildingCase.caseNumber', label: 'Case', width: '60px' },
-    { key: 'arrivalDate', label: 'Entrée le', width: '90px' },
-    { key: 'pricePerKg', label: 'Prix/kg', width: '65px' },
-    { key: 'finalPrice', label: 'Prix total', width: '100px' }
-]
+const { columns } = useBovineColumns()
 
 const title = computed(() => {
     if (!buildingCase.value) return ''
@@ -228,13 +264,6 @@ const formatPrice = (price: number | null) => {
     return `${price.toLocaleString('fr-FR', { minimumFractionDigits: 2, maximumFractionDigits: 2 })} €`
 }
 
-const rowClass = (item: BovineData): string => {
-    if (item.ageMonths === null || item.ageMonths === undefined) return ''
-    if (item.ageMonths >= 24) return 'bg-violet-300 hover:bg-violet-400'
-    if (item.ageMonths >= 22) return 'bg-red-300 hover:bg-red-400'
-    if (item.ageMonths >= 20) return 'bg-orange-300 hover:bg-orange-400'
-    return ''
-}
 
 const loadCase = async () => {
     if (!hasCaseId.value) {
@@ -266,6 +295,7 @@ watch(caseId, (id) => {
     }
     filters.value.buildingCase = `/api/building_cases/${id}`
     loadCase()
+    loadStats()
     reload()
 }, { immediate: true })
 </script>
diff --git a/frontend/pages/inventory.vue b/frontend/pages/inventory.vue
index 399acde..429d9e8 100644
--- a/frontend/pages/inventory.vue
+++ b/frontend/pages/inventory.vue
@@ -13,6 +13,7 @@
                 <h1 class="font-bold text-3xl uppercase text-primary-500">Inventaire bovins</h1>
                 <span class="text-lg text-slate-500">({{ totalItems }} bovin{{ totalItems > 1 ? 's' : '' }})</span>
                 <div
+                    v-if="auth.isAdmin"
                     class="bg-primary-500 p-1 rounded-md flex items-center cursor-pointer hover:opacity-80"
                     :class="exporting ? 'cursor-not-allowed opacity-60' : ''"
                     title="Exporter en Excel"
@@ -34,17 +35,17 @@
         </div>
 
         <div class="flex flex-wrap gap-3 mt-4">
-            <div class="flex items-center gap-3 rounded-md border-2 border-violet-300 px-4 py-2">
-                <span class="text-2xl font-bold text-violet-700">{{ stats.over24 }}</span>
-                <span class="text-sm uppercase tracking-wide text-violet-700">≥ 24 mois</span>
+            <div class="flex items-center gap-3 rounded-md bg-red-500 px-4 py-2">
+                <span class="text-2xl font-bold text-white">{{ stats.over24 }}</span>
+                <span class="text-sm uppercase tracking-wide text-white">≥ 24 mois</span>
             </div>
-            <div class="flex items-center gap-3 rounded-md border-2 border-red-300 px-4 py-2">
-                <span class="text-2xl font-bold text-red-700">{{ stats.between22And24 }}</span>
-                <span class="text-sm uppercase tracking-wide text-red-700">22 – 24 mois</span>
+            <div class="flex items-center gap-3 rounded-md bg-orange-500 px-4 py-2">
+                <span class="text-2xl font-bold text-white">{{ stats.between22And24 }}</span>
+                <span class="text-sm uppercase tracking-wide text-white">22 – 24 mois</span>
             </div>
-            <div class="flex items-center gap-3 rounded-md border-2 border-orange-300 px-4 py-2">
-                <span class="text-2xl font-bold text-orange-700">{{ stats.between20And22 }}</span>
-                <span class="text-sm uppercase tracking-wide text-orange-700">20 – 22 mois</span>
+            <div class="flex items-center gap-3 rounded-md bg-yellow-500 px-4 py-2">
+                <span class="text-2xl font-bold text-white">{{ stats.between20And22 }}</span>
+                <span class="text-sm uppercase tracking-wide text-white">20 – 22 mois</span>
             </div>
         </div>
 
@@ -56,7 +57,6 @@
                 :items="items"
                 :total-items="totalItems"
                 :loading="loading"
-                :row-class="rowClass"
             >
                 <template #header-nationalNumber>
                     <UiTextInput
@@ -112,7 +112,12 @@
                     {{ formatDate(item.birthDate) }}
                 </template>
                 <template #cell-age="{ item }">
-                    {{ formatAgeLabel(item.ageMonths) }}
+                    <span
+                        class="inline-block rounded px-2 py-0.5 font-semibold"
+                        :class="ageBadgeClass(item.ageMonths)"
+                    >
+                        {{ formatAgeLabel(item.ageMonths) }}
+                    </span>
                 </template>
                 <template #cell-arrivalDate="{ item }">
                     {{ formatDate(item.arrivalDate) }}
@@ -139,7 +144,8 @@
 import type { BovineData } from '~/services/dto/bovine-data'
 import { useAuthStore } from '~/stores/auth'
 import { useDataTableServerState } from '~/composables/useDataTableServerState'
-import { formatAgeLabel } from '~/utils/bovine-age'
+import { useBovineColumns } from '~/composables/useBovineColumns'
+import { formatAgeLabel, ageBadgeClass } from '~/utils/bovine-age'
 
 const router = useRouter()
 const auth = useAuthStore()
@@ -267,19 +273,7 @@ const singleDateFilter = (afterKey: string, beforeKey: string) =>
 const arrivalDateFilter = singleDateFilter('arrivalDate[after]', 'arrivalDate[strictly_before]')
 const birthDateFilter = singleDateFilter('birthDate[after]', 'birthDate[strictly_before]')
 
-const columns = [
-    { key: 'nationalNumber', label: 'N° National', width: '80px' },
-    { key: 'workNumber', label: 'N° Travail', width: '43px' },
-    { key: 'sex', label: 'Sexe', width: '70px' },
-    { key: 'birthDate', label: 'Né le', width: '72px' },
-    { key: 'age', label: 'Age', width: '110px' },
-    { key: 'breedCode', label: 'Race', width: '70px' },
-    { key: 'buildingCase.building.label', label: 'Bâtiment', width: '75px' },
-    { key: 'buildingCase.caseNumber', label: 'Case', width: '60px' },
-    { key: 'arrivalDate', label: 'Entrée le', width: '90px' },
-    { key: 'pricePerKg', label: 'Prix/kg', width: '65px' },
-    { key: 'finalPrice', label: 'Prix total', width: '100px' }
-]
+const { columns } = useBovineColumns()
 
 const formatDate = (date: string | null) => {
     if (!date) return '—'
@@ -297,13 +291,6 @@ const formatPrice = (price: number | null) => {
     return `${price.toLocaleString('fr-FR', { minimumFractionDigits: 2, maximumFractionDigits: 2 })} €`
 }
 
-const rowClass = (item: BovineData): string => {
-    if (item.ageMonths === null || item.ageMonths === undefined) return ''
-    if (item.ageMonths >= 24) return 'bg-violet-300 hover:bg-violet-400'
-    if (item.ageMonths >= 22) return 'bg-red-300 hover:bg-red-400'
-    if (item.ageMonths >= 20) return 'bg-orange-300 hover:bg-orange-400'
-    return ''
-}
 
 onMounted(() => {
     reload()
diff --git a/frontend/utils/bovine-age.ts b/frontend/utils/bovine-age.ts
index 6613bc9..2cad363 100644
--- a/frontend/utils/bovine-age.ts
+++ b/frontend/utils/bovine-age.ts
@@ -8,3 +8,11 @@ export const formatAgeLabel = (months: number | null | undefined): string => {
     if (!label) label = '< 1 mois'
     return label
 }
+
+export const ageBadgeClass = (months: number | null | undefined): string => {
+    if (months === null || months === undefined) return ''
+    if (months >= 24) return 'bg-red-500 text-white'
+    if (months >= 22) return 'bg-orange-500 text-white'
+    if (months >= 20) return 'bg-yellow-500 text-white'
+    return ''
+}
diff --git a/src/ApiResource/BovineInventoryExport.php b/src/ApiResource/BovineInventoryExport.php
index 023c85c..418ce77 100644
--- a/src/ApiResource/BovineInventoryExport.php
+++ b/src/ApiResource/BovineInventoryExport.php
@@ -19,7 +19,7 @@ use App\State\Bovin\BovineInventoryExportProvider;
                 description: "Retourne un fichier XLSX listant tous les bovins actifs (exitedAt IS NULL) triés par date de naissance croissante, avec colorisation des lignes selon l'âge.",
                 tags: ['Bovines'],
             ),
-            security: "is_granted('ROLE_USER')",
+            security: "is_granted('ROLE_ADMIN')",
             output: false,
             provider: BovineInventoryExportProvider::class,
         ),
diff --git a/src/Entity/Bovine.php b/src/Entity/Bovine.php
index 0c7cd09..2f8ac2d 100644
--- a/src/Entity/Bovine.php
+++ b/src/Entity/Bovine.php
@@ -14,6 +14,7 @@ use ApiPlatform\Metadata\Get;
 use ApiPlatform\Metadata\GetCollection;
 use ApiPlatform\Metadata\Patch;
 use ApiPlatform\Metadata\Post;
+use App\Repository\BovineRepository;
 use App\State\Bovin\BovineProcessor;
 use DateTimeImmutable;
 use Doctrine\ORM\Mapping as ORM;
@@ -21,7 +22,7 @@ use Symfony\Component\Serializer\Attribute\Context;
 use Symfony\Component\Serializer\Attribute\Groups;
 use Symfony\Component\Serializer\Normalizer\DateTimeNormalizer;
 
-#[ORM\Entity]
+#[ORM\Entity(repositoryClass: BovineRepository::class)]
 #[ORM\HasLifecycleCallbacks]
 #[ORM\Table(name: 'bovine')]
 #[ORM\UniqueConstraint(name: 'uniq_bovine_national_number', columns: ['national_number'])]
@@ -79,6 +80,7 @@ class Bovine
 
     #[ORM\Column(type: 'float', nullable: true)]
     #[Groups(['bovine:read', 'bovine:write', 'building_case:read'])]
+    #[ApiProperty(security: "is_granted('ROLE_ADMIN')")]
     private ?float $pricePerKg = null;
 
     #[ORM\Column(type: 'date_immutable', nullable: true)]
@@ -168,6 +170,7 @@ class Bovine
     }
 
     #[Groups(['bovine:read', 'building_case:read'])]
+    #[ApiProperty(security: "is_granted('ROLE_ADMIN')")]
     public function getFinalPrice(): ?float
     {
         if (null === $this->receivedWeight || null === $this->pricePerKg) {
diff --git a/src/Repository/BovineRepository.php b/src/Repository/BovineRepository.php
new file mode 100644
index 0000000..d12f3b2
--- /dev/null
+++ b/src/Repository/BovineRepository.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository;
+
+use App\Entity\Bovine;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+
+/**
+ * @extends ServiceEntityRepository<Bovine>
+ */
+final class BovineRepository extends ServiceEntityRepository
+{
+    public function __construct(ManagerRegistry $registry)
+    {
+        parent::__construct($registry, Bovine::class);
+    }
+
+    /**
+     * Compteurs des bovins actifs par tranche d'âge.
+     *
+     * @return array{total: int, over24: int, between22And24: int, between20And22: int}
+     */
+    public function getInventoryStats(?int $buildingCaseId = null): array
+    {
+        $qb = $this->createQueryBuilder('b')
+            ->select(
+                'COUNT(b.id) AS total',
+                'SUM(CASE WHEN b.ageMonths >= 24 THEN 1 ELSE 0 END) AS over24',
+                'SUM(CASE WHEN b.ageMonths >= 22 AND b.ageMonths < 24 THEN 1 ELSE 0 END) AS between22And24',
+                'SUM(CASE WHEN b.ageMonths >= 20 AND b.ageMonths < 22 THEN 1 ELSE 0 END) AS between20And22',
+            )
+            ->where('b.exitedAt IS NULL')
+        ;
+
+        if (null !== $buildingCaseId) {
+            $qb->andWhere('b.buildingCase = :caseId')
+                ->setParameter('caseId', $buildingCaseId)
+            ;
+        }
+
+        $row = $qb->getQuery()->getSingleResult();
+
+        return [
+            'total'          => (int) ($row['total'] ?? 0),
+            'over24'         => (int) ($row['over24'] ?? 0),
+            'between22And24' => (int) ($row['between22And24'] ?? 0),
+            'between20And22' => (int) ($row['between20And22'] ?? 0),
+        ];
+    }
+}
diff --git a/src/State/Bovin/BovineInventoryExportProvider.php b/src/State/Bovin/BovineInventoryExportProvider.php
index 96e7106..57513e2 100644
--- a/src/State/Bovin/BovineInventoryExportProvider.php
+++ b/src/State/Bovin/BovineInventoryExportProvider.php
@@ -25,12 +25,12 @@ final class BovineInventoryExportProvider implements ProviderInterface
 {
     private const HEADER_FILL = 'FFF1F5F9';
 
-    private const COLOR_VIOLET = 'FFC4B5FD';
-
     private const COLOR_RED = 'FFFCA5A5';
 
     private const COLOR_ORANGE = 'FFFDBA74';
 
+    private const COLOR_YELLOW = 'FFFDE047';
+
     private const HEADERS = [
         'N° National',
         'N° Travail',
@@ -182,14 +182,14 @@ final class BovineInventoryExportProvider implements ProviderInterface
             return null;
         }
         if ($ageMonths >= 24) {
-            return self::COLOR_VIOLET;
-        }
-        if ($ageMonths >= 22) {
             return self::COLOR_RED;
         }
-        if ($ageMonths >= 20) {
+        if ($ageMonths >= 22) {
             return self::COLOR_ORANGE;
         }
+        if ($ageMonths >= 20) {
+            return self::COLOR_YELLOW;
+        }
 
         return null;
     }
diff --git a/src/State/Bovin/BovineInventoryStatsProvider.php b/src/State/Bovin/BovineInventoryStatsProvider.php
index df6c649..c33a9bd 100644
--- a/src/State/Bovin/BovineInventoryStatsProvider.php
+++ b/src/State/Bovin/BovineInventoryStatsProvider.php
@@ -7,7 +7,8 @@ namespace App\State\Bovin;
 use ApiPlatform\Metadata\Operation;
 use ApiPlatform\State\ProviderInterface;
 use App\ApiResource\BovineInventoryStats;
-use Doctrine\DBAL\Connection;
+use App\Repository\BovineRepository;
+use Symfony\Component\HttpFoundation\RequestStack;
 
 /**
  * @implements ProviderInterface<BovineInventoryStats>
@@ -15,26 +16,22 @@ use Doctrine\DBAL\Connection;
 final class BovineInventoryStatsProvider implements ProviderInterface
 {
     public function __construct(
-        private Connection $connection,
+        private BovineRepository $bovineRepository,
+        private RequestStack $requestStack,
     ) {}
 
     public function provide(Operation $operation, array $uriVariables = [], array $context = []): BovineInventoryStats
     {
-        $row = $this->connection->fetchAssociative(<<<'SQL'
-            SELECT
-                COUNT(*) AS total,
-                COUNT(*) FILTER (WHERE age_months >= 24) AS over_24,
-                COUNT(*) FILTER (WHERE age_months >= 22 AND age_months < 24) AS between_22_and_24,
-                COUNT(*) FILTER (WHERE age_months >= 20 AND age_months < 22) AS between_20_and_22
-            FROM bovine
-            WHERE exited_at IS NULL
-            SQL);
+        $rawCaseId = $this->requestStack->getCurrentRequest()?->query->get('buildingCaseId');
+        $caseId    = null !== $rawCaseId && ctype_digit((string) $rawCaseId) ? (int) $rawCaseId : null;
+
+        $row = $this->bovineRepository->getInventoryStats($caseId);
 
         $stats                 = new BovineInventoryStats();
-        $stats->total          = (int) ($row['total'] ?? 0);
-        $stats->over24         = (int) ($row['over_24'] ?? 0);
-        $stats->between22And24 = (int) ($row['between_22_and_24'] ?? 0);
-        $stats->between20And22 = (int) ($row['between_20_and_22'] ?? 0);
+        $stats->total          = $row['total'];
+        $stats->over24         = $row['over24'];
+        $stats->between22And24 = $row['between22And24'];
+        $stats->between20And22 = $row['between20And22'];
 
         return $stats;
     }