Questiondo rabbit nipples pop out the day or night befor she gives birth
AnswerDear Libertti,
Rabbit nipples might appear to swell a bit when birth is imminent, since mama will be producing milk in preparation for the babies. But they never get really large or pendulous, as a dog's mammaries (and associated tissues) get. So that's not really a great way to know if the bunny is about to give birth.
Please read:
http://www.bio.miami.edu/hare/breeding.html
I hope this helps.
Dana