We adopted our now 2 year old 25kg mixed breed 2 years ago. She has settled in well (with a lot of work!) and is a great family dog. I work from home and dds are 6 and 10. We would love to have another dog, a companion for our pfd, a smaller dog, maybe a terrier mix or toy mix (we live in Texas so there are a gazillion chihuahua mix puppies in shelters).
What should I consider when looking for another rescue dog? Obviously, good with kids and dogs but beyond that?