Hey guys,
Went to the vets and ($90 later) she took his temperature which is up about a degree - normal for cats is 38.5, his was 39.4, she also said his breathing was sounding a bit raspy, so she gave him a shot for the his fever and gave me some paste to give him. So I'm glad I took him to the vet Hopefully he gets better fast
I thought a picture of him might be appropriate (yes he's in our kitchen sink, he refuses to drink unless it's from a running tap)
Thanks everyone for your help