Try turning him off and back on or maybe just reloading. Sometimes kerfur goes crazy jumping around and spinning and is uncontrollable. Apparently it's when he gets wet.
My Kerfur didn't get wet, didn't walk in circles, and didn't go crazy. I turned Kerfur on and off and re-entered the game many times, but nothing changed. I released it from the base to fix the servers, but Kerfur wobbled from side to side even when it was in the base.
