Hi, I have 4 pekin ducklings that are about 2 weeks old. Within the last couple days, I noticed their bellies are constantly wet. Their home is filled with pine shavings that we clean out and replace at least once a day. Their water dish is a chick feeder that is difficult to spill. They have a heat lamp that dries them off but their bellies never seem to dry. It is almost prickly under there. We put them for a swim in a large bin every day and they dry off well after. Are the wet bellies bad?