Wow! She really shouldn't have gotten paid. The agreed upon compensation was for agreed upon work, which she didn't really hold up her end of that bargain, so...
I've seen people use garlic, honey, and Apple cider vinegar with the mother in the water. Make sure the chicken stays warm and dry. I had one that needed some extra care and I kept her sectioned off from the others with her own heat source until she started walking properly.
I brooded my chicks in the house. First 2 weeks they were right off my kitchen. I had no smell issues, just a cute cheep cheep all day, and silence all night. Made it much easier for me to keep up on them with 6 little kids to not always have to run to a coop to check on them. Now they're in the...