I know the answer to this since my brother has Allergies. To answer your question, you can be allergic to one, or both, or a lot of animals. The fur is different in all of the animals by a little bit. If you still want one of these animals but are allergic (you can be tested at the doctor) you can get one that is:
It's really not the fur, its the dandruff of animals to which people are sometimes allergic. A kid with allergies may or may not be allergic to rabbits, but on the whole, it would probably be better to avoid rabbits.
Not necessarily. You could be allergic to just something a dog or a cat has, or maybe something they both have, and so it's not necessarily true that rabbits carry the same thing that you are allergic to, however, it is a possibility.
No. Cats have fur with curtain bugs that keep up the moisture in their skins. Rabbits have textured oil as do dogs.
It's a peptide. It's not necessarily the same peptide for every person, and certainly not for every type of animal (if it were, anyone who was allergic to dogs would also be allergic to cats, rats, bears, monkeys and probably people). But if there is a protein common to the dogs and the cats and say, horses too, then a person allergic to that protein all these animals have in common could have an allergic reaction to all these animals.
They are not much alike- no more alike that people and cows, I would say.
Yes, two or more would be a good pair.
no
Buffaloes , wolves , prairie dogs , rabbits ,
skunks,chipmunks,squrielle,leopard,cheetahs,rabbits
No... You would mainly either have a dog or a cat. But you can still have a rabbit no matter what.
You can never tell with allergies like that, so don't risk it .
Mice, Rabbits, Hares, Foxes, Wolves, Polar Bears, and... Humans.