Why is this chicken thing so hard........-Missing-Limping-Molting/Bugs

Why is this chicken thing so hard sometimes, so far It's been a great and rewarding experience,
but this week started new challenges for 5 chickens.

1. I have a missing chicken, broody somewhere or food for our new foxes.*(no roster, so the eggs wouldn't be fertile)
2. A Limping Chicken this morning.............been reading all morning here about causes.
3. A molting chicken or she has bugs, post pic later, she won't let me catch her now I'll have to check her later.

Thanks for listening, my kids "Why are you on that site again?'lol

 

!. No sign of the missing chicken.

2. I checked her foot good last night, no scabs or sores.
I have fattened up these girls this summer, maybe too much, I think I'll cut down on their treats.
My top roost is about 5 feet high, is that too high to jump down from?

3. Checked her for bugs last night, didn't see any, but I could be wrong.
Pics......