So a lot of people like to make ungulate (hoofed) animals with the canine/feline bases. Only thing is they don't really look like the real animal. So I have some wearable mesh ideas, I would make them myself but I don't know how to mesh.
Hooves:
1. Horse hooves.
2. Split hooves
A lot of people also want different tail varieties. Problem is making a mod overwrites the current tail. So why not make meshes instead. They would come in different colors so you could pick the one the closest to your characters color.
Tails:
1. Fluffy tail for cats
2. Thin (domestic dog) tail for dogs
3. Bob tail for dogs
4. Donkey/cow tail for both cats/dogs
5. Horse tail for dogs
6. Bear tail for both cats/dogs
7. Dragon tail for cats