My guinea pig isn't eating?

Your guinea pig has an upper respiratory infection and needs to see a vet asap or it will be to late to treat him. He needs to be on antibiotics and a product called Critical Care that you can get form the vet. It is a powdered formula for sick and under weight guinea pigs. He may also need to be hydrated by the vet. Please do not wait to get him there or you will loose your guinea pig.