Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 Sandra的狗生了7只小狗。她的兽医给了她105份奶粉，供小狗们连续5天喂食。Sandra每天应该喂几次小狗？


### Response:
 每天，Sandra会有105/5 = <<105/5=21>>21份奶粉。
每只小狗每天需要喂食21/7 = <<21/7=3>>3次。