Age gap

[ChickieHime207]

Hello I got 4 leg horns about a week ago and they are starting to feather well today I got 4 red sex links that just got in from the hatchery so I put them together how can I tell that my leg horns are picking on the little fuzzies

 

[Spartan22]

They should be fine, I got four 1.5 wk old chicks in the brooder few days ago we hatched 12 chicks. They are doing fine together and no pecking.