I was just sitting on the milk stand talking on the phone and I noticed my 8 week old buckling has a lump on his neck right under this jaw on the midline. It is not hard but not really squishy- feels like playdough under the skin. We just got back from the county fair 10 days ago (and he had to go along due to still nursing). Today is the very first that I noticed anything. He acts fine and is his normal bouncy self. What do I need to look for, or do? He is a Nubian.