hi am not sure about the inner leg i have not heard of that one but have the ear, but i will definetly never have any more pets chipped after what i have seen .i have all the stages of prins wound on disc everyother day when she was having her dressings changed for my solicitor to look at before he contacts the chip company regarding getting the chips researched and rectified. i cant forgive myself for what she has bin through just for a chip it is awfull to see and no i have to leave her at the end of visiting which is heart breaking. i now have a pitition in place to send to the company and the goverment officer who deals with this, thanks for your support just think carefully before you get your pets chipped .