Would it be ok to use untreated pine from Home Depot to make platforms in a crabitat? Should I use small nails or wood glue to put them together? Can I use apple tree branches? I use the trimmings from apple tree prunings (small branches) for my rabbit to chew on - would it be ok to use them in the crabitat for the crabs to climb on? Another site told me pine was bad for crabs - I hadn't heard that before.