My corgi puppy is 9 weeks old and I am trying to get him to wear a collar so we can go for walks. Whenever I put the collar on he freaks out! Scratching at it and rubbing against the walls trying to get it off! I’m trying to ease him into it by putting it on for a little while each day, but he isn’t getting used to it. Is this normal? Should I have bought him a harness instead of a collar?