(This is especially common among Chihuahuas and Dachshunds). Aggressive behavior in Chihuahuas will usually start with poor treatment and lack of rules and expectations that your dog can follow. are afraid of certain objects, places, or people (people in wheelchairs for example) have separation anxiety. are possessive of their food bowl.


Veterinarian's Assistant: I'll do all I can to help. My chihuahua will get aggressive for instance he wears a little harness and sometimes manages to get his arm out of one side but will not let me just take it off other times is unpredictable. 6 ways to socialize your dog to prevent Chihuahua aggression: For example, if someone takes some of Sophie's food away, she is going to learn to protect it by using aggressive behavior such as growling and biting. When did you first notice this aggression? become aggressive if another animal or person gets close to its owner.