Others have all contributed excellent advice. I'll just add a few small points.
Type of feed is important. Feeding layer feed, which is high in calcium and low in protein, when hens are molting is not providing the nutrients they require at this time. I gave up on layer feed practically from the starting gate and I feed an all flock feed with oyster shell to satisfy calcium demands. This provides all the nutrients, including protein, a mixed flock needs. No need to switch feeds according to season or for roosters or baby chicks. Everyone can eat the same thing.
Falling into the marketing trap of buying supplements for your flock as well as feeding too many extra foods such as the bananas and other treats, also cuts into a balanced diet. Poop can be a useful indicator of whether your chickens are getting a balanced diet. Commercial feeds are designed and fine-tuned to deliver that balanced diet. No extra supplements are necessary.
The toes are fine. As with humans, things happen along the course of a life to alter the body. Chickens adapt to these, and they do not rant and complain about it as we humans do.