It's the middle of a very cold Winter. Well, that horse might be very glad for a blanket and a good owner will put a blanket on their horse when it's cold enough. And some people just think it's cute to put hats and sweaters and boots and all kinds of clothing on their dogs. Sometimes, animals need a doctor, even if it's just for a check-up. Because animals are different than people, they have special doctors called veterinarians who take care of them.
Veterinarians know a lot about animals so they're best at fixing what's wrong.
But you can give him clean water. Lots of cats don't like water, but you can brush them to make their fur as pretty as possible. That's why some people's homes have birdbaths in the yard. The birds can just fly in, swish around in the water and fly away again. Horses and some dogs like baths, too.