Determining chick age

[TheWickedChicken]

I got 4 SLW chicks last month from the feed store on around May 20th, I don't remember exactly which day. They definitely weren't day old chicks, but I don't know their hatch date and I think they had different aged chicks all mixed together anyway. I'd like some opinions on their approximate age. Images below were taken today. The head feathers are coming in, though their heads are still mostly down at this point.

 

[KaylorFarms]

I'd say they are 5 weeks

 

[TheWickedChicken]

I was thinking between 4-5 weeks. Good to know I wasn't far off. Thanks for the response!

 

[KaylorFarms]

You're welcome!