I definitely would not diffuse anything in the room they are kept! Or have any on your hands when feeding/handling. However, I have a pretty good story. We had two babies(siblings) together in a 75 gallon tank. We were waiting for them to get a certain size before separating.. but one day, one of them grabbed the back toes of the other. We immediately separated them.. but the poor baby had major damage to two toes. The vet said to use Neosporin.. but he still bled for 2 days so I looked up the toxicity of Helichrysum oil(pure), there was none.. so I tried a drop diluted with coconut oil on the poor toes. Within the hour, the bleeding had stopped and our beardie healed very well.