Hello Kayla
Maybe due to restarts or just SL, the scripts in the female cat are not working fully so maybe try to re-rez her and see if this will fix the problem? I have had a few problems with them eating/consuming milk, so I send the cat to the cattery then back into SL and normally that can fix it when it is just one or a few cats affected and others are able to drink the milk, as your male cat seems to be doing. Also reset the range of your cat because I am not sure or not, if the restarts that can mess with this or the scripts, and also that she is the right group, if that is a factor