Sulky Tort

[Pricey32]

We have had our hermanns for just under a year, we have noticed just lately he has become stayed inside the covered end of his table not coming out for food or drink. the only time he is active is when taken outside and we are unable to do it for long due to the fact we have no cage or anything to protect him from our dog. the temps in his table are fine always in the 30s but he/she just stays in bed? Does anybody have any advice as to what we could do to encourage him out?or do i just leave it just to get on with it? i worry that with him still being quite young that he may starve.

Thanks all