i have a female chihuahua. she has been in heat for a little over 2 weeks. and i looked at her today and her tits are bigger. i have a min pin that has been fixed. people are me have not fixed dogs. and my husband has let her out side. what coukld this mean?
It is not unusual for her teets to get bigger with a heat. If she has not been out of your sight, I wouldn't worry about it. Also she is probably just now receptive. Keep a tight leash on her, and I would get her spayed soon unless she is the best of best and you show her. Chi's can be really hard to breed.