It's hard to conclusively draw a connection between "displays homosexual behavior" and "is homosexual" in animals, but homosexual behavior has indeed been obser

It's hard to conclusively draw a connection between "displays homosexual behavior" and "is homosexual" in animals, but homosexual behavior has indeed been observed in dogs (as well as lots of other species). Interestingly, among giraffes, male-male sex is actually much more common than male-female sex, some studies found that up to 90% of giraffe sex was male-male. (One bit on Wikipedia says giraffes are occasionally described as "especially gay", which I found amusing)