Hi, I am new to keeping chickens. I have a mixed flock of 6, mainly Australorps and RIRs. I got them at 2 weeks old and they are now 18 weeks. I raised them largly on pullet pellet recently switching to layer pellet. More recently I bought a 20kg bag of scratch mix which seems to be mainly mixed grains and corn. I throw handfuls of this around thier run. Problem is, they have taken so well to the scratch, they barely touch thier pellet. Is this a problem? Can I raise them purely on grain? I also feed them kitchen scraps, porridge, pasta ect. One of thier favourites is clover. Thank you all for any advise you can give me as I feel I much to learn.