There are two ways that can conclusively prevent unwanted pregnancies in dogs. Your dog can have no interaction with any dog of the opposite sex (aside from desexed dogs). This isn't awlays a valid option, and the only other method is pet desexing. If a dog falls pregnant, you may assume that you've missed the opportunity to have her desexed, and must wait until the puppies are born. This isn't in fact the case.
8 March 2022