I have a female shih tzu that was born August 28, 2006. She has had 2 heat cycles and the latest one for 3 weeks starting around October 6thish 2007. She is not spayed because she has congential kidney disease and the vet believes the anesthetic is too risky. During her heat she wore a doggy diaper in the house and only had to off to go outside and she was watched everytime while she was outside. A male puppy around 4.5 months was periodically at my house and after a few times tried to mate with her even though we were told he wouldnt, so home he went. There was no pentration because of the diaper and the small fact that he was confused and was trying to mate at the wrong end...her head. Since this last heat her breasts and nipples have become so large they are hanging at least 1.5 inches and are so large they bouncing around when she moves. I have researched false pregnancies and she had some other symptoms, swollen vulva, increased resting, food decrease/increase, etc. but I am still not sure if that is what she is experiencing. Within the last 2 weeks her breasts have gotten to the size I have already described (all the way up her body) and they have become more firm. Our vet told us this isnt anything to worry about, but I would like some other opinions or other peoples experiences with dogs who may have this.
ps. I have 2 other dogs one neutered and one to be spayed (she is a pup) and the puppy I referred to in my post and my female pup are being neutered/spayed in the next 2 weeks.