Safe wood for DIY ledges?

Hi, recently I visited Lowe’s who apparently have safe KN pine with no sprayed chemicals. The employee who helped me out claimed the Whitewood they had was KN pine, so I purchased a slab and constructed a few ledges with poop guards. Someone who used this in their cage recommended it. Does anybody know for sure if it’s safe? I want to verify before I put the ledges in their cage. If it isn’t safe I will wrap the ledges in fleece (my chinchillas don’t try and eat fleece).
Please let me know soon, I’m planning on gifting these ledges with the chinchilla I am returning from fostering tomorrow.
Thanks!