I feed my gals Flockraiser pellets - soon to switch to Layena pellets. With dogs, I know to mix the two different feeds to transition to the new feed. Do I need to do this with chickens? The feed is placed in a long rectanglar planter. As they eat the feed, they crumble up the pellets and I am left with a bunch of pellet dust in the bottom of the feeder - seems like alot of waste. What can I do with the dust? Thanks!