diff --git a/internal/infra/models/pig_batch.go b/internal/infra/models/pig_batch.go
index db17bd3..658c31b 100644
--- a/internal/infra/models/pig_batch.go
+++ b/internal/infra/models/pig_batch.go
@@ -106,51 +106,3 @@ type WeighingRecord struct {
 func (WeighingRecord) TableName() string {
 	return "weighing_records"
 }
-
-// PigBatchSickPigLogChangeType 定义了病猪变化日志的类型
-type PigBatchSickPigLogChangeType string
-
-const (
-	SickPigChangeTypeAdd    PigBatchSickPigLogChangeType = "新增" // 新增病猪
-	SickPigChangeTypeRemove PigBatchSickPigLogChangeType = "移除" // 移除病猪 (康复, 死亡, 转出等)
-)
-
-// PigBatchSickPigTreatmentLocation 定义了病猪治疗地点
-type PigBatchSickPigTreatmentLocation string
-
-const (
-	TreatmentLocationOnSite  PigBatchSickPigTreatmentLocation = "原地治疗"
-	TreatmentLocationSickBay PigBatchSickPigTreatmentLocation = "病猪栏治疗"
-)
-
-// PigBatchSickPigReasonType 定义了病猪变化的原因类型
-type PigBatchSickPigReasonType string
-
-const (
-	SickPigReasonTypeIllness     PigBatchSickPigReasonType = "患病" // 猪只患病
-	SickPigReasonTypeRecovery    PigBatchSickPigReasonType = "康复" // 猪只康复
-	SickPigReasonTypeDeath       PigBatchSickPigReasonType = "死亡" // 猪只死亡
-	SickPigReasonTypeEliminate   PigBatchSickPigReasonType = "淘汰" // 猪只淘汰
-	SickPigReasonTypeTransferIn  PigBatchSickPigReasonType = "转入" // 病猪转入当前批次
-	SickPigReasonTypeTransferOut PigBatchSickPigReasonType = "转出" // 病猪转出当前批次 (例如转到其他批次或出售)
-	SickPigReasonTypeOther       PigBatchSickPigReasonType = "其他" // 其他原因
-)
-
-// PigBatchSickPigLog 记录了猪批次中病猪数量的变化日志
-type PigBatchSickPigLog struct {
-	gorm.Model
-	PigBatchID        uint                             `gorm:"primaryKey;comment:关联的猪批次ID"`
-	PenID             uint                             `gorm:"not null;index;comment:所在猪圈ID"`
-	PigIDs            string                           `gorm:"size:500;comment:涉及的猪只ID列表，逗号分隔"`
-	ChangeType        PigBatchSickPigLogChangeType     `gorm:"size:20;not null;comment:变化类型 (新增, 移除)"`
-	ChangeCount       int                              `gorm:"not null;comment:变化数量, 正数表示新增, 负数表示移除"`
-	Reason            PigBatchSickPigReasonType        `gorm:"size:20;not null;comment:变化原因 (如: 患病, 康复, 死亡, 转入, 转出, 其他)"`
-	Remarks           string                           `gorm:"size:255;comment:备注"`
-	TreatmentLocation PigBatchSickPigTreatmentLocation `gorm:"size:50;comment:治疗地点"`
-	OperatorID        uint                             `gorm:"comment:操作员ID"`
-	HappenedAt        time.Time                        `gorm:"primaryKey;comment:事件发生时间"`
-}
-
-func (PigBatchSickPigLog) TableName() string {
-	return "pig_batch_sick_pig_logs"
-}
diff --git a/internal/infra/models/pig_sick.go b/internal/infra/models/pig_sick.go
new file mode 100644
index 0000000..73eed01
--- /dev/null
+++ b/internal/infra/models/pig_sick.go
@@ -0,0 +1,46 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// PigBatchSickPigTreatmentLocation 定义了病猪治疗地点
+type PigBatchSickPigTreatmentLocation string
+
+const (
+	TreatmentLocationOnSite  PigBatchSickPigTreatmentLocation = "原地治疗"
+	TreatmentLocationSickBay PigBatchSickPigTreatmentLocation = "病猪栏治疗"
+)
+
+// PigBatchSickPigReasonType 定义了病猪变化的原因类型
+type PigBatchSickPigReasonType string
+
+const (
+	SickPigReasonTypeIllness     PigBatchSickPigReasonType = "患病" // 猪只患病
+	SickPigReasonTypeRecovery    PigBatchSickPigReasonType = "康复" // 猪只康复
+	SickPigReasonTypeDeath       PigBatchSickPigReasonType = "死亡" // 猪只死亡
+	SickPigReasonTypeEliminate   PigBatchSickPigReasonType = "淘汰" // 猪只淘汰
+	SickPigReasonTypeTransferIn  PigBatchSickPigReasonType = "转入" // 病猪转入当前批次
+	SickPigReasonTypeTransferOut PigBatchSickPigReasonType = "转出" // 病猪转出当前批次 (例如转到其他批次或出售)
+	SickPigReasonTypeOther       PigBatchSickPigReasonType = "其他" // 其他原因
+)
+
+// PigBatchSickPigLog 记录了猪批次中病猪数量的变化日志
+type PigBatchSickPigLog struct {
+	gorm.Model
+	PigBatchID        uint                             `gorm:"primaryKey;comment:关联的猪批次ID"`
+	PenID             uint                             `gorm:"not null;index;comment:所在猪圈ID"`
+	PigIDs            string                           `gorm:"size:500;comment:涉及的猪只ID列表，逗号分隔"`
+	ChangeCount       int                              `gorm:"not null;comment:变化数量, 正数表示新增, 负数表示移除"`
+	Reason            PigBatchSickPigReasonType        `gorm:"size:20;not null;comment:变化原因 (如: 患病, 康复, 死亡, 转入, 转出, 其他)"`
+	Remarks           string                           `gorm:"size:255;comment:备注"`
+	TreatmentLocation PigBatchSickPigTreatmentLocation `gorm:"size:50;comment:治疗地点"`
+	OperatorID        uint                             `gorm:"comment:操作员ID"`
+	HappenedAt        time.Time                        `gorm:"primaryKey;comment:事件发生时间"`
+}
+
+func (PigBatchSickPigLog) TableName() string {
+	return "pig_batch_sick_pig_logs"
+}