Okay, knock wood, I've only had one dog...when I was a kid...who had this problem. Cassie has never had the problem, and so far, knock wood again many times, Boomer hasn't either. Do all or most dogs have this problem or do some dogs never have to have theirs expressed....Oh I hate that term....sounds like you are making lemonade or something......by the way, Sunny, tell your friend they have a very good wit about them!!