That looks like an EXTREMELY traumatized bird.
I'm sorry, I can't help you because that level of trauma has not come up in my flock.
Taking grown birds on trips more that a couple of hours long can really stress them out.
They could even be internally injured. :hugs
OK. I feel tubing feeding will be dangerous, and not worth the risk. Try putting them in the open air. Will they drink at all? Dip their beaks in the water.