Hey Ben. So far I've only done this with Sulcatas and South African Leopards. CA Deserts are just starting and some more species are in the works. Neal is doing his Babcock leopard and several other people are doing various other species. In time we will have all the answers. Leopards are one of the most sensitive to respiratory problems and so far all of them have had ZERO problems with high humidity. One ket is to ALWAYS keep them above 80. Day and night 24/7. The combination of cold and wet is where the problems usually start. I invite everyone to try it out and report back to the forum what their results are. In my own experience, and in the Austrian study, 80% or higher seems to be the magic number.