Hello! One of my chickens hasn't been able to fly higher than a few inches for a couple months. She seems to be a little weaker than the others and I was wondering if you might have any ideas on what to give her and the other hens that could strengthen them. Also, 2 of my chickens have passed away from a sickness where they slowly get weaker and eventually become paralyzed. Do you have any ideas on what this is and how I can prevent it? Thank you so much! God bless!