bad behavior of dachashund


New Member
I have a female mini dachshund, about 4 years old. She has been crate trained and to her, that is her home where she goes to sleep and rest, etc. But when she is in there and the other dogs come walking by, she gets possessive/aggressive with a snarling bark/growl. Nothing has changed in the household as far animals or people. She just started doing this a few weeks ago. Not sure why.

Can anyone tell me what I can do to change this behavior?