hello I know I havent been on in a long long time. sorry. I have some q's my yorkie oliver will limp after being walked for a ways, and we called the vet and he said it might be a luxating pattella, but we have to bring him in to be shure. has any one else had this happen to them? what happend, how did they correct it? also when do yorkies become seniors? oliver is 4 years old now. thanks for your help guys, and I will try to come back more often