Why do male dogs have nippeles?

Male dogs have nipples because they develop them as part of the basic mammalian anatomy. Nipples are a common feature in mammals, both male and female, as they are part of the reproductive system.

In mammals, the basic body plan includes nipples or teats as a trait shared by both sexes. In females, nipples are essential for nursing offspring. In males, they don't have a functional role but are present due to the shared developmental pathways in embryonic development.

The presence of nipples in male dogs is a normal anatomical feature and does not indicate any health problems.