My boy (cocker spaniel-5mos.) had surgery yesterday and is on Rimadyl for pain. Is it possible or likely that this can cause him to be really, really hyperactive? He's been doing fine, but I gave him a pill at 5:15 and he has been extremely hyper, meaning he can't seem to lie down or just sit still for more than one second at a time and he's panting like crazy. I'm wondering if it could be from the pill. Any thoughts/experiences would be appreciated as he is my first doggy and this is his first (and hopefully ONLY) surgery. I'm really worried about him.