My boy has an injured paw

Hi,
I was just lying down with Tigger, and I noticed that one of the side bits of his claws had come of , as they do so I decided to go around and get the rest of them, then I got to one nail and it well, wasnt there - there was a bit less hair around it and I think kinda like a tiny stub of a nail then little bits of it in other places, then I saw some pus and now Im freaking out,

I did see him holding that paw up this morning, and I was going to take a look but I completely forgot, and It seems like with something like that it would of mega hurt and had some serious blood - but i havent seen any blood nor have I really seen him in any pain, or doing anything different with the paw.

I dont know whether It warrants a vet visit or not, I mean it seems "healed" apart from the pus but I really dont know, because I havent had a really great look at it and Im a little scared too. It doesnt seem to be bothering him.

Any Ideas on what could of Happened to him? Do I need to get him to a vet asap? or Just clean out the pus and keep a good eye on it?

thanks

The pus indicates an infection of some sort--I would definitely see a vet. The nail could have been pulled out, but the pus might require antibiotics to clear up.