Where do you get that and is it safe for the babies?
Thank you!
Yes it is safe,,, Only drawback with sulfur,,,,,, If you handle sulfur dusted chickens,,, your hands may smell like rotten eggs. That is the smell of sulfur. Washes off easily.
The rotten eggs smell is also common in Yellowstone Nat. Park geysers. Yes,,, from sulfur

This is the one I am using. It stretches' a long way.
Once you think your mites are well under control,,, then just stop adding to dusting area.
I have discussed this on our state thread in the past. Some individuals place a quantity of sulfur into a sock. Hang the sock in the chicken pop door area. As chickens exit, and enter,, they brush some sulfur onto their feathers. I have not tried that myself. Just into the dusting hole spots.
In case there are no Ace Hardware stores in your area,,, just do a Google search like this, And click shopping tab.