When cats groom themselves, they pull their hair with their tough tongues. Do they digest the fur and does it come out when they use the litter box? Or, like owls, do they have a special place to hold the fur, and eventually throw it up in hairballs?
Answer by Pawz for Purrz
usually it just passes right through, but sometimes if there is a lot they get hairballs which irritate the stomache and cause them to throw up