New to chickens and I need help with the feeding situation

[scinocco]

Hello, I just got my chickens! (They were my birthday present) I have never had chickens before and I have a question for you experts out there. My flock is made up of
A white leghorn who is over a year old, don't know how old exactly,
A Black frizzle, who is 9-10 mo
A leghorn that is mixed something also around 9-10 mo
and
My favorite so far, A cuckoo maran, who is 12 weeks. (she follows me around)
All these ages are what the person I bought them from told me

I know at least 2 of these birds are laying and when I went to buy food. I got the layer food.
Now that I've done some more research, I know I need to get some grower feed for the younger chicken, the feed store didn't have it in stock and the other one only sold it in 50 lb bags (yikes).

I should be able to get a smaller bag of grower feed by the end of the week, will the younger one be ok eating the layer stuff until I can get the grower feed?

I'm feeling a little overwhelmed to be honest and I would love a little guidance. Thanks

Here's a picture of the girls.

 

[Delta2 23]

I'd say it should be okay. Some people say the extra calcium is not so good for the younger ones, but our chicks started eating layer feed from about 3 months old. They wouldn't touch their chick crumbles when the older chickens were having their layer food too. :

Oh, and forgetting my manners here... and happy birthday!