[Cirlonde]

So, we took Chloe to a new vet for the first time since we've moved to get her one year booster shots. She did great, vet says no problems, etc. But I noticed yesterday that she's got a small knot on her side now. It's maybe the size of a nickel and raised up, but she doesn't act in pain when I touch it and she never gave any indication that she was bothered by the shots. She is still running, jumping and playing just like normal. (Her very first shots as a puppy bothered her a lot and she acted very sore afterwards...would cry out if you even ran your hand along her side.)

Is this just a natural reaction to the shots and will it go away soon or should I be calling the vet? Since she doesn't act like it bothers her, I thought I'd give it a few days to go down before getting worried...but I also wanted to ask the experts!!

((On a side note, we love the new vet!! She actually brought up the over-vaccination controversy herself and agrees that we are over-vaccinating these tiny dogs, etc. I was so excited! She also said Chloe's teeth and knees look great!))
Thanks!
-C