So I just went away for a week on vacation and I was feeding my chickens starter feed. They are almost 7 weeks now. My pet sitter had to buy a new bag of food and he got the multi flock bag. Is that okay to feed to them? The bag says that it is meant for replacement chicken 0 to 8 weeks old and it is crumble food. What should I do? He also suddenly change the food from the starter to this so I don’t know if that could be bad for them? Any help is much appreciated.