Hello, my ducklings are almost 2 weeks old and they eat the paper towels in the cage. I put fresh towels down and in an hour, they wet it and eat it all. They have plenty of food, but seem to love the paper towels. I put pine shavings in the cage. I notice they peck and may eat small bits of it. Is it harmful? I know chemically, it is not, but can they break it down and pass it? I've read on here some using it without problems and some say they will die from eating it. Please helpThanks..