mated but not pregnant

Question
Our male Beagle has mated and had puppies with our female for 3 litters. Then this January they were tied 2 times and then no puppies came. My question is can we let our friend use him as a stud and expect a pregnancy or how do we know if something is wrong and if so on the male or females part.

Answer
Hi. There are many different things thatcan happen that will prevent a pregnancy. This dog already had three litters before? Were they back to back, or did she have a break? If a dog is bred on every heat, it can lead to small litters, weak pups, and infertility. Breeding on the wrong days will also cause a dog to miss. An infection on the female's part may cause it, you may want to have her checked out for an infection and then a few weeks before heat, put her on antibiotics. To tell on the male's part, you'll want to get a semen sample done to make sure he has good swimmers, and to make sure he doesn't have an infection as well. Good luck!