From what you describe - the less running or playing, off food, 'grumpy' reactions (what were the girls doing before he snapped at them - were they touching him in any way?, pulling him along by the collar? trying to get him to move etc?), it sounds like he could be in pain. I would get him to the vet for a checkup. Tracy Bassett Murrumbateman, Australia espinay@bigpond.com