I have 2 isa brown chickens, they are about 18-19 months old. In the past few months, they seem to have problems with their feathers: Those two are free range chickens, free to roaming about in our backyard (roughly 400sqm - 500sqm), on the lawn. We mix breakfast cereal with bird seeds, that's their main food. Often they get noodles and bread or plain dough. Sometimes they get cucumbers (they don't eat vegetable scraps). Occasionally they get fruits (cherries or watermelon leftover because they only eat red fruits). We also eat a lot of prawns and they get all the prawn heads. Do my birds need protein? I am thinking of feeding them fish because it's rich in protein. I bulk bought 2kg-3kg of fish fillets today and cooked 3 small ones. I gave my chickens a quarter and my chooks loved it! My questions are that 1) Are my chickens molting? 2) Can I feed them fish to help they re-grow their feathers as fish is a good source of protein. If so, how much should I be feeding my birds everyday and for how long?