$10 plus a minimum of 10 eggs a day is pretty good. Averages out to around $14-15 a day (if they were to sell the eggs).
Wow. I can’t even start to imagine how badly she treats her own chickens.
No, you are not wrong to be upset. :hugs
I always have a friend or family member do the chicken chores after a few days of training. It’s the safe way for me.
Best of luck with your birds. Hoping they all get better soon!