I thank you for your prompt interest. I tried to reply, but did it wrong, so here's take two.
My JRT "Teddy", has a mind of it's own. He'll do his tricks on command just prior to his dinner. After that, I get no response from him.
I take him for a walk before his dinner, but there is too much distraction from the presence of other dogs who use the same park, to get any training responses. I've tried liver treats, cheese (which he likes usually), crisps,sausages.dog bics,etc. and,unlike other dogs, he may or may not perform for treats. He also, never comes to me when called. I often have to run away from him to make him chase me and then catch him. When I tell him off, he just gives me his paw.