Hi All. I just adopted a Jack Russell a month ago. She can be really sweet and came with limited bad problems. Her biggest being separation anxiety - which I can understand as I am her fourth (final) owner. We are working on this.

She always seemed friendly to other dogs and I never had concern with her being aggressive. She seemed well socialized. However, the last couple of interactions with other dogs has been slightly surprising as she has started to nip at their face! Today, she actually seemed to nip pretty hard at another dog that I was embarrassed.

What would be starting this behavior now and how do I stop this from becoming a problem?