The only thing obvious to me is that the jill is not herself which could be caused by a number of things. It could be related to being left in season or it might not, as you say a visit to the vet might be the best option
Can't get my head round the second part of your reply. It might be something contagious yet you suggest getting it to a hob, I don't think the owner of the hob would be too happy if it went downhill aswell.
All other things being equal, nobody should ever leave their jill in season without a vac hob or jill jab. Why take unecessary risks?
Both the j