diff --git a/internal/domain/pig/pig_batch.go b/internal/domain/pig/pig_batch.go
index 4576d7e..7d14efd 100644
--- a/internal/domain/pig/pig_batch.go
+++ b/internal/domain/pig/pig_batch.go
@@ -67,6 +67,16 @@ type PigBatchService interface {
 	// ---调栏子服务 ---
 	TransferPigsAcrossBatches(sourceBatchID uint, destBatchID uint, fromPenID uint, toPenID uint, quantity uint, operatorID uint, remarks string) error
 	TransferPigsWithinBatch(batchID uint, fromPenID uint, toPenID uint, quantity uint, operatorID uint, remarks string) error
+
+	// --- 病猪管理相关方法 ---
+	// RecordSickPigs 记录新增病猪事件。
+	RecordSickPigs(operatorID uint, batchID uint, penID uint, pigIDs string, quantity int, diagnosis string, treatmentLocation models.PigBatchSickPigTreatmentLocation, happenedAt time.Time, remarks string) error
+	// RecordSickPigRecovery 记录病猪康复事件。
+	RecordSickPigRecovery(operatorID uint, batchID uint, penID uint, pigIDs string, quantity int, treatmentLocation models.PigBatchSickPigTreatmentLocation, happenedAt time.Time, remarks string) error
+	// RecordSickPigDeath 记录病猪死亡事件。
+	RecordSickPigDeath(operatorID uint, batchID uint, penID uint, pigIDs string, quantity int, treatmentLocation models.PigBatchSickPigTreatmentLocation, happenedAt time.Time, remarks string) error
+	// RecordSickPigCull 记录病猪淘汰事件。
+	RecordSickPigCull(operatorID uint, batchID uint, penID uint, pigIDs string, quantity int, treatmentLocation models.PigBatchSickPigTreatmentLocation, happenedAt time.Time, remarks string) error
 }
 
 // pigBatchService 是 PigBatchService 接口的具体实现。
diff --git a/internal/domain/pig/pig_batch_service_pig_sick.go b/internal/domain/pig/pig_batch_service_pig_sick.go
new file mode 100644
index 0000000..f088a06
--- /dev/null
+++ b/internal/domain/pig/pig_batch_service_pig_sick.go
@@ -0,0 +1,27 @@
+package pig
+
+import (
+	"time"
+
+	"git.huangwc.com/pig/pig-farm-controller/internal/infra/models"
+)
+
+// RecordSickPigs 记录新增病猪事件。
+func (s *pigBatchService) RecordSickPigs(operatorID uint, batchID uint, penID uint, pigIDs string, quantity int, diagnosis string, treatmentLocation models.PigBatchSickPigTreatmentLocation, happenedAt time.Time, remarks string) error {
+	panic("implement me")
+}
+
+// RecordSickPigRecovery 记录病猪康复事件。
+func (s *pigBatchService) RecordSickPigRecovery(operatorID uint, batchID uint, penID uint, pigIDs string, quantity int, treatmentLocation models.PigBatchSickPigTreatmentLocation, happenedAt time.Time, remarks string) error {
+	panic("implement me")
+}
+
+// RecordSickPigDeath 记录病猪死亡事件。
+func (s *pigBatchService) RecordSickPigDeath(operatorID uint, batchID uint, penID uint, pigIDs string, quantity int, treatmentLocation models.PigBatchSickPigTreatmentLocation, happenedAt time.Time, remarks string) error {
+	panic("implement me")
+}
+
+// RecordSickPigCull 记录病猪淘汰事件。
+func (s *pigBatchService) RecordSickPigCull(operatorID uint, batchID uint, penID uint, pigIDs string, quantity int, treatmentLocation models.PigBatchSickPigTreatmentLocation, happenedAt time.Time, remarks string) error {
+	panic("implement me")
+}