A neighbor wants us to take his 6 month old Rat Terrier. They have let the dog develop some dominance behaviors. Not understanding that if you don't want a big dog jumping up it also goes for small dogs.(hate those nail marks!) We are hopeful that we could train her. But I am not making the decision to take her lightly.She would become a forever member of our family and we really need to think about it. In the past we had a small mixed breed dog (little terrier) that was a sneaky chicken thief. She would sit and look at the birds,ignore them when you were around and then kill them when it suited her. What have been some of your experiences reguarding this breed ? Any responses would be appreciated so I can make a more informed decision.Thanks in advance!