Wed update: From the start the chicks had nutri-drench in the water. Gave it directly to chick #1. Chick #2 was actively eating and drinking on its own.
Chick #1's feet did improve by the second day and it was able to stand. However after a brief improvement, the health rapidly declined from there. It showed no interest in eating or drinking and would only wake up when touched, but usually did not feel compelled to get up. I made the decision this morning to cull it so it would not die from dehydration, etc.
Chick #2 took about 36 hours to show significant improvement in activity levels, but then activity became much more normal. It is half the size of the rest of the hatch, but is on its way to catching up. I successfully integrated it with the rest of them last night with no issues.
Initially I thought #1 might make it with a little foot care and #2 probably wouldn't, so you just never know how things will turn out.