Actually, I don't see anyone being allergic to leos. However, I myself am somewhat allergic to my cresties. Everytime I handle them I get blotchy spots all over where they walk, on my arms and hands and I stuff up really bad. I also know several people who aren't able to keep them because they have such an allergic reaction to their feet. Sounds really weird I know. But leos, no theres nothing to be allergic to. I don't think.