What's with Andy?

Don't Eat the Yellow Snow (2x11)

Air date: Jan 19, 2004

When pools of yellow liquid appear near the canine ice sculptures at the East Gackle Winter Carnival, two things are for sure. Ice dogs don't pee and Andy Larkin is somehow involved. But with all that extra security in place, how did he do it? It's enough to make Mrs. Weebles barking mad!