Thanks Andy, having read the article, i still dont see where im going wrong and if something I have done has caused this to happen. They have deep enough substrate to burrow in if they wish, they choose not to and sleep under a log roll bridge just very slightly burrowed. Their diet is good and you may recall i had to over winter Ant & Dec as they had medication in the summer. The tubs that I planted in November have seen them through this winter with viola, violets, campanula, bellis daisies and pansies, also the odd bit bit of Opuntia and Pereskiopsis. This particular tortoise was 76g when I got him 10 months ago, he is now 113g so has gained 37g in 10 months which only equates to 3.7g a month so I dont think I have over fed him.
He has passed more of these today

He looks as though he is growing nice and smoothly as well which I am quite proud of:

I think all I can do then is up the baths to daily for the time being but I cant help thinking - you can take a tort to water but you cant make it drink
