Does it always smell or only for a few days when you 1st add the sulfur?I put sulfur in the dust bath, and poof the birds, roosts and such. Works if I remember to do it. I don't notice the smell 20 ft away. Keeps ticks off dogs and pants but that is a noticeable smell
I like the idea of making some hanging bags for self-application. Perhaps hanging 2 on the sides of the chicken door. My chickens hang out under a specific shade tree, so some sprinkled on the ground there would work for summer. Their fav spot to dust bath is the mulch under the swing set. Sulfur-scented kids doesn't sound pleasant, so I doubt I'd put any there.
I must also ask what the chickens smell like. We do hold our chickens, so a brief couple days of no cuddling would be OK. Smelly birds all summer would not work for us.