So my bearded dragon has been living on the sand mat dessert terrarium substrate for probably over a year now. He's going to be 3 this year. Yesterday I noticed it appears he has darker looking calluses on his back feet. Also his shorter toe on one side is kind of crusty. I've been reading about rot but his tail is fine. He has not been bitten by anything, but he has been in heat so he's been going crazy and running around. I think maybe he's cause micro abrasions by running so much.i don't think it's retained shed on the bottom of his feet but maybe on his toe it could be. I've replaced the mat with a softer towel for now and I've been bathing him and gently brushing his feet with a tooth brush. I have read a lot of people use betadine in water and then apply Neosporin to the affected area. Is that an appropriate thing to Do? I will take him to the vet if it persists. I will post a picture of his feet once I figure out how. Thanks to anyone who has any input to share