[Jacob-list] Lump under chin on ram

[Peaceful Valley Farm]

Hi all,
We just gave someone a ram lamb last night, and when we went to catch him, we discovered a lump underneath his jaw.  It isn't hard, it's has a kind of water baloon feel to it.  Here's a link to some pictures: http://youandyouroilthing.blogspot.com/2007/09/aarons-lump.html
(It's not my website, but the blog of the new owner of the ram.)
Any idea as to what this is, and what to do about it?
Matthew
Peaceful Valley Farm
Ringgold, GA
www.peacefulvalleyfarm.com 
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