I hope Mousie recovers. I currently have 7 Guinea Pigs/Cavies. We usually adopt the hard-luck, often elderly piggies from our local rescue so we lose them more often than normal owners. It doesn't get any easier. Just as an FYI on chocolate and rodents...rats will actually drink chocolate milk until they explode. I'm not sure about mice but I know that rats and guinea pigs are physically unable to throw up--that's why poisons are REALLY dangerous for them. Even if Mousie looks better on Monday it might still be worth a trip to the vet to make sure there are no long-term effects from this episode. :)= (that's sopposed to be a rodent smilie).