Our adorable three year old whippet, who had previously been very happy around all dogs, developed anxiety which was sometimes leading to aggression. After being used to a well-behaved pup on the lead, walks were becoming a nightmare. We couldn't let him off and it was distressing to see this nasty side of him we weren't used to. It wasn't good for him either as he could no longer play safely with his dog friends due to his unpredictable nature. Something had to be done, this behaviour was on...