Last year my cat had an emergency- all of a sudden his foot and leg swelled up to twice the normal size, and was painful. It was so sudden, we though he may have been bitten by a rattler (we do get them in this area) They told us to bring him in right away, they saw us immediately upon arrival, and treated him very well. He is usually a very nervous cat, and hates to go to the vet, but for some reason, he was totally calm while they examined him, and determined it was not a snake bite. They never could determine what had caused the swelling, but gave him antibiotics ( a shot and then pills for at home) and observed him for awhile. The swelling did go down after a day or two, and we have never had the problem again. They only charged us $100 for everything, which seems fair to me- I have been charged much more for a lot less treatment at different vets over the years.