What does he normally eat? Crumbles or corn? Or you can try feeding him some scrambled eggs. Those are nice and soft and should go down nicely. Just make sure he's had plently to drink before you feed him, so nothing gets stuck.
The saline solution shouldn't sting as much--I know it sounds weird, but if you've ever bitten your lip, y'know how it tastes salty? That's because our blood has salt in it. They use intravenous saline for patients in the hospital who have had major injuries to help replace their blood.
(I wish you had an IV for your roo!)
What kind of dairy products do y'all have? Buttermilk?
The saline solution shouldn't sting as much--I know it sounds weird, but if you've ever bitten your lip, y'know how it tastes salty? That's because our blood has salt in it. They use intravenous saline for patients in the hospital who have had major injuries to help replace their blood.

What kind of dairy products do y'all have? Buttermilk?