before I take this pig to the vet I'd like to get any thoughts out there. The pig is about 75 lbs and has developed a knot on his neck. The knot is hard as a rock and big as a tennis ball. I've had other animals get knots that were full of pus and had to be lanced and let drain(nasty!) and I hate to go to the vet if that is what this is as we can deal with that ourselves. Do pigs get goiters? He's seemingly healthy otherwise. Thanks!!