He's a 14 year old paint horse gelding, named Johnny. About a month ago I noticed a small lump on his neck where the neck and jaw meet up. It was pretty small so I didn't think anything of it. But now, it's about the size of a child's fist and it's firm! I don't know what it is! I've read around and I think it's a piece of grain or food stuck in a gland...(totally blanking on the name of it...) It's on the right side, thankfully, so I know it's not Choke.
He does let me touch/poke the lump and doesnt seem like he's in pain whatsoever. He's still eating and drinking normally, and my mom said we wont call the vet until he start showing signs of discomfort or pain. The only thing that seems 'off' is that when he yawns, he doesnt open his mouth all the way like normal.
I got him a salt lick too, just to keep him drinking water.
He's on free feed, eating alfalfa/hay mix, and about once a week he gets turned out to a bigger pasture to eat the fresh grass.
Can someone help me with what this lump might be??