When to put dirt in my brooder

[Danbenj]

Hi
I have 3, 4 week old chicks and 3, 2 week old chicks and was wondering whether it would be ok now to put some dirt from the outside coop into my brooder so that the chicks develop a good immunity. I have 6 hens outside and will want to start introducing the chicks to them when they are a little older and the weather gets a little warmer (I live in the UK).
Thanks

 

[NatJ]

Yes, introducing dirt now is OK.

 

[CaliforniaMountainChicks]

I introduce a container of our soil starting from the day that we get the chicks. So yes introducing the soil now is absolutely ok.