Actually on a slightly more serious level I was thinking they should cooperate and each drink as much milk as possible lowering it until they could stand on the bottom. That would buy them some time to think of the next step at least. Until they started peeing it back out. Which would negate a repeat of that strategy.
Apparently, they weren’t the smartest frogs in the pond.
Or, worse, they might find themselves drowning in pure cr*p.