Hi. I just joined this forum. I have a 3 year old Yorkie cross, and having some trouble training him to walk nicely with me, without going nuts when he sees another dog. He is in his 4th class in training, and has 4 more to go. I must say, he isn't doing well. Will not do anything when we are there and is totally stressed at the end of the class. Any suggestions would help. Thx