I have a 3 years old chihuahua and about a week ago she has started to get aggressive with everyone, she growls, and sometimes she tries to bite. She has started to get territorial to. We have had the same routine with her since she got here and she has never been aggressive, she has been quite the opposite, very clingy. I have a lot of other dogs and cats and se gets along with them very well when they interact. She is also the only pet inside of the house and she has always been around other people. What could possibly be causing her behavior? What should I do about it?
submitted by /u/Beautiful-Guava4425
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