That is not molting. Molting is done in a certain order. I'll copy an excerpt from a Kansas State article and give the link.
The birds will lose old feathers and grow a new set in the following order: head, neck, body, wings and tail.
MF2308 Molting and Other causes of Feather Loss in Small Poultry Flocks (ksu.edu)
I agree with the others, that looks like rooster damage. The danger is that the claws or spurs can cut the hen if she has a bald spot. It doesn't happen that often but it can. If the hen gets a raw wound the others sometimes turn into cannibals, which can kill her. It is usually not that bad but it can happen.
Some hens are more prone to bare spots than others. They have brittle feathers that break easily. Some are favorites and get mated more. Some boys have a bad technique that can lead to bare spots. Reducing the number of boys is certainly the first step.
If a feather is totally removed it should grow back fairly soon. If a tiny bit of feather shaft remains that feather will not be replaced until the next molt. That red one looks like she has some feathers regrowing.
This type of damage is fairly common and often looks worse than it really is. But there is a real danger, I consider reducing the number of boys to be a very wise move.
right about favorites, they like my leghorns and they have it worst of the bunch. I may put the boys in a rooster only coop at night til I can rehome. 
