Don't take a single minute out of your day to worry about this....believe me. It is because of her shots. It won't go away for a couple of months and the vet said to just leave it alone. When I took my Abbie, he immediately knew what it was.....reaction to the shots. Apparently the tissue has a reaction to the med and tries to surround it, which causes the bump. Have fun with your puppy!!
Smiles~
Gina
