Well, many animals have ‘hair’ which - considered in aggregate - might be referred to as ‘fur’: Guinea pigs, for example - and they will eat hay.
Maybe SAM is a great, courageous keeper of little rodent pocket pets.
Informative article on ‘hair’ and ‘fur’, in cats:
https://www.thesprucepets.com/cat-fur-vs-hair-554813
(We’re certainly getting this New Year off on a very high intellectual level...)
True dat, I also thought of rabbits. My we Freepers are a curious lot.