Ive fed them a couple of parsley last sunday and some green bell peppers yesterday cos the poops were normal before thatAll I can suggest is that they need to be taken back to the vet. Normally keeping them off veg and only feeding them hay will help stabilise the gut and things will get back to normal within a couple of days but as this hasnt happened with your piggies, they really do need to see the vet within the best couple of days
Btw their poops arent like what it is before here's an updated look View attachment 156686View attachment 156686