Quoting Nic0le1521:" Does he have a fever?"
Quoting The Blissful Six:" He probably just wants lots of cuddles. Vaccines take a lot out of some kids...they don't all react the same. And he could be sore from it and walking might hurt his legs."
Quoting JessieLeeAnne:" I didnt think of that! He had two in each leg. I bet that is what it is since when I got him out of bed, he refused to follow me in the living room like he usually does. Thanks! "