In this particular case it seemed he always ate a proportional amount of hay to pellets but favoring pellets the last two weeks. He was eating hay all the way to the end. He'd be munching on it even on the last three days when I was hand feeding. He only ate a few blades of it though. Once the antibiotics kicked in the end of day 2 he started chewing obsessively on his shelves, put a big dent in his wooden hay feeder, and rounded the corners of his lava rocks that he usually avoided.