I just rescued a 1.5 year old female chihuahua and this is my first female dog. She has not yet been spayed. (we are going to get her spayed) We have had her for about 6 weeks. She was doing very well with my 2 mastiffs(both fixed) and my cat and yesterday she tried to bite both the mastiffs when they came near me. She has never done this before. I put her in her room when this happened. Could she be starting her heat? The privious owners could not really tell me anything about her. She needed all her vax and not seen a vet since her puppy shots.
Thank you
Tiffany


