A quick internet search will reveal the results from experiments with keeping rodents on pine versus other beddings.

There is a reason why the keepers of high-end show rats and mice do not use pine.

For feeders, it doesn't matter. But I don't trust pine for my valuable snakes, because even a small chance of a toxic reaction from it is too much chance.

I'm not sure what people think I'm lying about. Google is your friend, go look it up. .edu sites are best.