diff --git a/internal/infra/models/pig.go b/internal/infra/models/pig.go
index a954799..485fff7 100644
--- a/internal/infra/models/pig.go
+++ b/internal/infra/models/pig.go
@@ -33,13 +33,12 @@ const (
 // PigBatch 是猪批次的核心模型，代表了一群被共同管理的猪
 type PigBatch struct {
 	gorm.Model
-	BatchNumber      string             `gorm:"size:50;not null;uniqueIndex;comment:批次编号,如 2024-W25-A01"`
-	OriginType       PigBatchOriginType `gorm:"size:20;not null;comment:批次来源 (自繁, 外购)"`
-	StartDate        time.Time          `gorm:"not null;comment:批次开始日期 (如转入日或购买日)"`
-	InitialCount     int                `gorm:"not null;comment:初始数量"`
-	CurrentCount     int                `gorm:"not null;comment:当前存栏数量"`
-	CurrentSickCount int                `gorm:"not null;default:0;comment:当前病猪数量"`
-	Status           PigBatchStatus     `gorm:"size:20;not null;index;comment:批次状态"`
+	BatchNumber  string             `gorm:"size:50;not null;uniqueIndex;comment:批次编号,如 2024-W25-A01"`
+	OriginType   PigBatchOriginType `gorm:"size:20;not null;comment:批次来源 (自繁, 外购)"`
+	StartDate    time.Time          `gorm:"not null;comment:批次开始日期 (如转入日或购买日)"`
+	EndDate      time.Time          `gorm:"not null;comment:批次结束日期 (全部淘汰或售出)"`
+	InitialCount int                `gorm:"not null;comment:初始数量"`
+	Status       PigBatchStatus     `gorm:"size:20;not null;index;comment:批次状态"`
 }
 
 func (PigBatch) TableName() string {