How often do you need to take your ferrets to the vet?

I know they need distemper shots and rabies but is there any other necessities?


also my one ferret is really fat..... literaly

another thing is treats......... does anybody have treats that their ferrets love because I want to buy my ferrets some treats they'll really like.



Lastly, is having a ferret nail clipper a necessity or can you use a regular nail clipper.