Wood Bird Ladder www.petsmart.com - $6.99 Product Description: Let your bird climb his way to the top on this wood ladder! A great addition to any cage. Hooks easily on Durable construction. RattyRat's Review: Rat's love using ladders and they make great additions to any cage, however we do recommend the plastic ladders over the wooden ones if you can find them. Our rats chewed the heck out of their wooden ladder and the wooden ladders are harder to clean.