My cardigan corgi Wilf was castrated May 26th 09 and since then he seems to have stepped back six months!! When we arrive at the dog walk close by he is straining at the lead to be let off, he is great off a lead and stays quite close . The problem is that lately after he has had his initial first run he heads back to me barking and try ing to bite my legs!!! Once i have scolded him and told him .NO he quite happily goes on his way. He has also gone back to walking between my legs and every once in a while he nips me on the outside of my knee. Both these habits he did when he was younger and i did manage to stop him from doing it but now it just seem strange that he has reverted back .Wilf is coming up 15 months now. Does anyone have any ideas as to why this should happen?