Sweaty Smelly Hum-Animals
Everyone knows dogs and cats don't sweat. But Humans do. And horses do.
Extra: Some horses already wear clothes. The owners shave their horses when it is hot:
Then on cold days they use a horse blanket
Some people only shave the part that goes under the blanket.
Hum-Animal people sweat too. Even the cat and dog people. They are closer to pure humans in this regard.
Civilised hum-animals do not like the smelly sweaty smell that smells sweaty, any more than humans enjoy the body odour of other humans.
The cat and dog people bath frequently. But with their long hair it takes days to dry off. Instead they trim their coats on their body to be short and easier to clean, and cover it up with clothes to keep warm.