Fox

The male fox's scrotum is held up close to the body with the testes inside even after they descend. Like other canines, the male fox has a baculum, or penile bone. The testes of red foxes are smaller than those of Arctic foxes. Sperm formation in red foxes begins in August--September, with the testicles attaining their greatest weight in December--February.

Question: is the fox part of the dog family
Answer: yes