Sam's been asleep all day - even more so than normal. He's also been even grumpier than normal especially when you go to stroke him and when he just got up to go for food, his back legs are very wobbly and he's struggling to walk on them.
We had to take Munchkin to the vets last weekend as he was out of sorts, very quiet and sleepy and when we tried to pick him up, he was very grumpy. Munchkin ended up on Metacam and antibiotic tablets.
Naturally, I'm going to take Sam to the vets in the morning if he's not any better, but I think (hope) that it's the same thing that Munchkin has had.