He did not want to cooperate. He pretty much refused to eat or drink anything, and they had to squirt his milk down his throat with a syringe. He was furious and spit most of it back out, but they were able to see him swallow a little bit.
Right now he's on honey thick liquids, the thickest kind. Based on what she could see, she thinks we can downgrade to nectar thick, which is about half the consistency. So that is good news. But I really wish he would have cooperated and drank all the consistencies so she could see if maybe we could stop the thickener all together. We weren't even able to try unthickened milk, after the fight he put up just trying the nectar thick.
So for now I'll just be happy that he is showing some progress and we can save a little money on the amount of thickener we have to buy. But I really wanted to see him drink some unthickened liquids. My gut thinks he might be ok. But now we have to wait another 4 months and cross our fingers he does better next time. So I'm happy and disappointed at the same time.