When to Breed Your Dog

• You can only breed your dog when she's in heat. Depending on the dog, the number of times she goes into heat is about four times a year. She will be in heat for three weeks.
  
  

Between Breeding Periods

• After your dog has puppies, she may become pregnant again in three months. It is unlikely she will become pregnant during the nursing period.
  
  

Age

• There is no age limit to when your dog will stop having puppies. Your dog's fertility will decline over time, but there is no set age.
  
  

Same Litter

• When your dog has puppies, those puppies can have puppies together as well.
  
  

Determine When Your Dog Goes Into Heat

• There are ways to detect when your dog will be in heat. Your vet can perform a microscopic examination of vaginal cells to inspect the cells and number.