Only just seen this, sending all the positive thoughts in the world for Archie
and hope that there is better news this morning.
Is there any chance he's eaten something he shouldn't have and got a blockage? (I'm no vet and I know his symptoms could be caused by many things), but when our springer came out of the pound he'd eaten half of his bed and was vomiting and then stopped eating and drinking. Just thought I'd mention it.
Whatever it is, I hope Archie is feeling a lot better very soon.