im dodgeracer4anonymous 4 years ago Hello, Maggie i am not that sure on that question but i am going to say it dosent because the hay is a good chewing material to discourage hairballs, and as a nesting material it can also help them digest their food better and it should be fed to you piggies, rabbit ,and your other small animals daily. oh and this is renea i misspelled my name with two e cause