I might be being paranoid but recently one of my pigs has started coughing occasionally, at least I think he's coughing, he has been known to choke on a bit of carrot when he eats it too fast. Is this something that should go to the vets asap or should I just monitor it for now? I'll be back at home from uni next weekend and he could go to a cavy savvy vet then, the one I use here doesn't see that many cavies. He's eating and playing fine but I would just like a more experienced opinion.