I'm thinking that it's just a vein that is a little enlarged at that spot...for it's not hard like a tumor or anything like that...it's kinda squishy...like pressing on your wrist where you can see all the veins (pressing on the vein).
I'm not entirely worried about it, it's stayed the same size since I went out to see him for the first time, but my barn owner who usually rolls her eyes when I mention that one of her horses got bitten, mentioned it to me. Which for her mentioning something on a horse is usually rare....but then again she still might be a little upset at me for not buying one of her horses (and her and the people I bought the horse from don't particually get along).
Does this sound like something I should be worried about Like I said, it's not growing any, and Sonny is still chubby around the neck, so I guess it could be a a fatty deposit..dogs can get them, so horses can, right?
Should I have my vet come out and look at it?
Also, it's not huge, it's maybe the size of a dime