Help! It's freezing out, the pond has a waterfall, so there are some holes in the otherwise inch thick ice. The calls keep going in there, and they are forming icicles on there rears when they come out. Is it dangerous?
Only if they can't warm up and dry off... if it worries you too much, block them off and just give them smaller opening waterers that they can still dunk their heads in but can't climb into...