Otis has been lethargic the past few days which I have been attributing to allergies. However I noticed swelling under his jaw. If he were human I would say it looked a little like a goiter only higher up, his collar would fit right under it. . It goes the width of the neck, is soft and flexible when palpated. I don't even know if it might be Bulldog fat. We have a vet appointment this afternoon but of course I am very nervous.