I am still in doubt because as I looked up online racks for reptiles, I found hundres of breeders that use plywood, which asccording to homedepot is made from pine, to build their racks. I even found a ton of breeders who are breeding BP's that have how to build your own racks on their web sights, and they actually say that they just bought pine 1 x's to build their racks. So I dont know for sure. I mean there are holes in the tubs for air, but the racks is primered with 3 coats and then, just to be sure, my hubby put Hi-Temp paint that is used on outdoor grills and engine blocks on it. Of course, we will wait a whole week for it to dry and air out before putting them in it, but do you guys think with the primer and paint the pine will still hurt them?