I have decided to change feeds of my recently inherited flock of 13 cocks, hens, pullets and cockerels (thanks to good advice I have read here) from layer to grower/broiler and make available plenty of oyster shell and crumbled egg shells for the laying hens. My question is, should I introduce the new SunCountry Organic feed slowly over a period of time along with the old pellet feed or can I just change it out once the old feed is finished. I know with my cat (finicky Leo) I have to be careful and change food through about a 7 day period.... Wondering if it could be the same for chickens. Thank you in advance for insight. Kris P.S. Also bought them a bag of mealworms for a treat! I can't wait for morning so I can spoil them!