I'd go for TB, and make sure that they are in Quarantine.
Prepare for the worst.
I suppose others will have their views, so I'm just giving you what I would think and do.
Mind you, I wouldn't have got them skinny gutted in the first place.
The old story that they haven't been feed yet, doesn't ring true, if that was what you were told.
On the happy side tho, EJ has some fantastic, self bred, young ones ready for sale.
Get hold of him and check them out.
Alan 104