Birch is just fine. The reason to avoid pine and certain other conifers is that they can contaminate the snakes water with oils that can be toxic to your snake.
It's adorable!! I love it!
That is so cool! You are giving me great ideas for my own home-made hides.
Has the wood been treated with anything during the processing? Are there different species of Birch or only one kind?
Same questions regarding Genus Pinus.