feeding just hatched chicks

[outback hatcher]

My chicks are just starting to hatch and i was wondering how long is to long to keep medicated chick starter?
I have some that has been kept inside but its about 5 or 6 months old is it safe to feed it to them or should I just go buy more to be safe?

 

[jerseygirl1]

Not sure, seems a little old

 

[outback hatcher]

iI decided to just buy more just to be sure