I have 2 snowy mallards that are 1 week old. They are in a smallish rubbermaid tub by my office desk & I have placed newspaper on the bottom & then paper towel on the top for convenience of cleaning. Anyway, what I notice is that when they get the paper towel wet, they start trying to tear pieces of it off, like they are playing with it. I haven't seen them eat it but it worries me. I really don't want to use the pine shavings in the house.... is there anything elses I could use that would be easy to clean that is safe for them? Thanks!