No, not at all. Some people may care if the dog’s gender matches or is compatible with the design, but it really does not matter if you like the costume on them. For instance, some people may think it is wrong to put the Animal Planet Butterfly costume on a male dog, but male pups would look just as cute as female canines with it on. It is really up to the dog owner’s preference of which ones to pick. None of them are really gender-specific, so they all should be great for either males or females.