I think the worst is that what you think is probably going to be something simple suddenly turns into something really serious and all the while the only time he was quiet and off his food was when my vet gave him some vetgesic as I was worried he might also be in some discomfort - so I just put his equafleece on and he just curled up for the rest of the night - he loves the fleece so much I didn't get it off him for 24 hours until he saw the Langford vet