They do seem to shed the skin on their head and feet. I have seen them in aquaria several times with what appears to be shed skin hanging off them in these areas. But I have absolutely no knowledge of turt's
Yeah, mine shed a bit. Especially after they get a cut from feeding or something... the skin usually comes away as it heals... My largest E. Maquarii is shedding some of her plates at the moment. I think she is getting her adult carapace!!! Shes a big girl now!!