I decided that the reason Leo got so grumpy after Suki came along was that she made him realize that he was a CAT. Until her presence, he had believed himself to be a dog.
It was a brutal discovery......and one he didn't like, hence all the y'ugliness.
So now that he goes outside with the dogs and comes back in with the dogs, and sniffs butts with the dogs, he has decided he really really really is...a dog.
So instead of meowing to go out or to come in, he does what most dogs do.
LET ME OUT!
LET ME IN!
hahahaha........at least he is happy again!