No, they won't chew and swallow it, but they may nibble at it. Just ask my PEW, Bree Bear who thinks she's a hair-dress. She will pick up my hair and nose it around and nibble it, but no actually EAT it.
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Rats' tails actually do have hair, they just don't have very much. The reason why though is because a tail with a limited amount of hair works better for balance and grip. If you like rats but just don't like the tail, there is a type of at without a tail called (of course) the tailess rat. Just find a goot breeder that has them and you should be pretty good off.
No. While fur helps protect rats, they don't absolutely have to have it. Some rats are born without it, and there are even lab rats specifically bred to be completely hairless. Lab supply companies can provide rats with many different types of specifications for various different research applications.
to keep warm
but what about the hairless rat? they have no hair!
so do you have something else about rats with hair ( hair keeps every thing warm )
- cardsfangavin
Yes, because they can't see very well and they need them so they can feel where walls are and whether they can fit through a gap or not.