It seems like Chomper is trying to stop the stalagmites in his cave from leaking by blocking it with his hand, although this only seems to cause water to flow all over his body, and, into his diaper instead!
This picture is based off a scene from the first episode of the Land Before Time TV Series where Chomper tries to plug up the leaks in the cave him and Ruby are staying in. The Scene: https://youtu.be/xoxLphlx4c0?list=PLWpRwPF7WwnmDg5p5r4h...
Looks like Ruby will need to give Chomper a diaper change soon!
