Poor Clonkers -hope the vet sorts him out tomorrow .
As Gill said , probably a virus he has picked up- try and keep his fluids up though .
When i had to keep Smarties fluids up because he was sick and had the runs , i gave him water in one of those little plastic syringes and let it trickle into his mouth.
Smartie will always drink it like that if you have to give him it that way -he is really good like that.