Poorly boy

My dog is still sick and is now in hospital. He's suffering from a colitis attack and the vet wants to give him an x-ray and put him on a drip.

He's blood results are all clear, but he is dehydrated. The vet gave me some glucose powder to put in his water but the doggy doesn't like that and drank out of the spring. Vet not happy! But if the dog is dehydrated surely drinking is what he needs to do?

Not entirely sure why they need to give him an x-ray for colitis. It's to check that he's not got any "masses", although none can be felt and he's not loosing weight.

If you want to visit his vet, there is a website here