Hard, moveable lump under jaw
I noticed a lump on the inside of my gelding's jaw today. It's about the size of a walnut, isn't hot, doesn't hurt, is very hard, and I can move it around a little. He doesn't have a fever or nasal discharge and behaved exactly the same as always. Is this an "oh my god call the vet NOW" issue or can I wait until I can split the call with someone else?
Of course, there wouldn't be any waiting if it changes for the worse - but money is tight and I don't want to drop $200 on an exam if he's going to be okay until February or March.