Jesse started limping on Saturday evening after getting up and I started getting worried about cruciate etc. However, Sunday morning he started nibbling and licking his right hind paw. I looked at it and saw a small wound which looked like the entrance of a grass seed or other foreign body into the skin right between his toes. I took him to the vet on Sunday morning and Ian had a good look at it. He said he wasn't sure whether there was something in there and wants to watch it first before going in all guns blazing. So Jesse is now on antibiotics and he also got one shot of short acting steroids. I am also giving Jesse homeopathic Silica to help expel any possible foreign body in there.
He was hopping around on three legs all of Sunday, but today is much better. The wound also looks much cleaner, but discharge is gone and no lump has come up. So I think Ian was right and there was nothing in there, perhaps just an irritation by a grass seed stuck in the fur around there. We'll see how it goes, but so far so good.