Aerion has has a bad problem with agression towards putting on his leash, harness, or even tightening and loosening his collar. He immediately rolls over on his back and pulls his teeth out snarling. He doesn't growl or bark but that behavior really bothers me. I cannot afford classes which I would really like to do and I know swatting him will make it worse. Any suggestions? I have to take care of this before my husband returns in Aug otherwise he will get rid of him