No, sorry, I didn't think about getting weights on them. Even if I had wanted to, we don't have a scale small enough to weigh such tiny things But if it was a vitamin/mineral deficiency, then the other mice would have had the same reaction since they were all fed the same Mazuri Rodent Chow lab blocks. It was given free choice and there was always plenty of food.

I also don't think that it was an allergic reaction to the dewormer for the pinworms. They had been sneezing and were generally poor looking. About a week before I put them on the aspen, the one mouse had started getting scabs around his neck and sides. I don't know if it was from his nails being too long or if it was a Staph. infection. I can't test him now since he has since been euthanized. I wish I had time to do another study on the effects of pine on them, but I don't think it is going to happen.