I tried feeding my most recent hatchlings the FF from the start with horrible results...mainly mess and lots of leftover food at the end of the day. I found myself bathing the feet of my chicks for an extended length of time as I tried to soften and wash off hardened FF, so I switched back to my dry organic starter feed until they were older. Now that they're 4 weeks old I give them FF feed part of the time and dry feed part of the time as they seem determined to have something to dump out and dig after in the brooder. I did notice that a couple of my smaller chicks eat the FF with tremendous enthusiasm and are now quickly catching up to the others in size and weight, making me wonder if they were just not getting enough of certain nutrients from the dry feed that they now get with the FF. All of my birds get a variety of foods including produce scraps from the kitchen, sprouted grains, a variety of fresh greens I grow for them in my garden, meal worms, every bug we can find for them, etc. plus both dry and fermented feed. I guess I'm just big on variety.