New chickens, need help with ID

[chcknrs]

Major score, found these free on Craigslist!

The gal said they were 3 months, but they are about the size of my 2 month olds. Can ya help me ID them, please?
They are in quarantine in the big brooder right now. How long for quarantine? 3 or 4 weeks?
The first appears to be a leghorn, the second I was thinking maybe red sex link? The next two are EE's, and the last the gal told me was a mystery chick. It is black with some brown on it's chest.

 

[Cheep Mama]

What an awesome find!!! They are very pretty. I agree with you on the breeds, I have no idea about the mystery chick. Any idea on why the former owner got rid of them?

 

[chcknrs]

She said a friend with too many chickens gave them to her, and her DH was raised with chickens and hates them. They all seem healthy and happy. Their poop is normal, and they are hand tame.
I just don't get it. How could anyone hate chickens? Anyway, she told me she got tons of emails, and she picked me!!!!I fed them yogurt and crumbles last night, and today I will dust them with some DE, and of course spoil them some!