Is an 8 week old RIR tall enough?

[brewfarm]

I've got a flock of Rhode Island Reds. Half of them are 8 months old. The other half are 5 weeks old. I want to get new feeders. The ones I'm looking at are 7.75 inches tall. The hens have met the chicks, but are separated by chicken wire. I was planning on integrating the flock at about 8 weeks. But, I'm wondering if the chicks will be tall enough to use the new feeders or if I should create a feeding area, for the chicks that they can reach, but the hens can't.

 

[sylviethecochin]

I don't exactly have a growth chart on hand, but I believe that at eight weeks, mine would have some trouble reaching that. 5-6 inches would be more their speed.