Changing the type of feed. How quickly?

[Lyranonamous]

Hi everyone

I want to change the feed of my girls to a better quality. I've read many comments here and I'm thinking of Blue Seal Do I need to change them over gradually? Or can chickens (8 months old) handle a sudden change?
Also what should I be looking for in a feed for this time of year in NY? I'm currently feeding them corn and some oyster shells in addition to the feed.
Should I look for some specific ingredients?

Thanks

Lyra

 

[jk47]

I would mix more of the old feed with a little new feed and Every week of feeding add a little bit of new feed to it intell the feed is made up of all new feed and I would never change a animals main feed suddenly that's just asking for trouble and for what to look for in the new feed I can't help don't live in NY
Hope I helped some