Just noticed this - she is 7m. Looks strange - kind of dead (as in no blood supply) - it also doesn't feel as soft and fleshy as the rest of the tongue. I have vague recollections of it looking red a few weeks ago. (FF BTW so I don't think its thrush)
Could she have bitten it? Is it scar tissue? Could it be a Tumour of some sort?
Any ideas?