I have 5 Loham browns around 18 months, one was very rough looking she had alot of feathers missing and her comb was very pale and shriveled, I have had her a few weeks and she now lays me a gorgeous egg but not frequently, although she now looks alot better hee feathers are coming back and her comb looks good, I have another one has feathers missing from below her vent and it is looking red but she lays every day, although her eggs are like they have been laid through barbed wire, my other 3 are gorgeous feathered and combs are nice and red, one lays every day but the others have not layer for a week now, there are feathers everywhere but no bald patches? I have checked for mites and lice can't see anything, they are eating drinking and being a good chicken with normal chicken behaviour, any ideas please? Is this a molt?