I'm in the process of constructing an interim brooder for my six 2 week old keets until they sell. They've been on rubber shelf liner for two weeks, but their toes and nails are getting stuck in it. Time for a different bedding. I've read that at two weeks it's okay to put them on shavings or wheat straw or...??????....I would appreciate opinions on what bedding to use at this age. I need something inexpensive and easy to find in stores - like Tractor Supply. TIA.