Should I be worried? Missing feathers

[blondegirl358]

I have 4 chickens, but one of them has a bare patch on her bum/belly. (The spot is down a ways from her vent, but you can see it when she's walking around.)

I'm wondering if she's just being picked on (I noticed a small scab next to her comb awhile back) or if it's something else that I need to be worried about.

I know that lice/mites can cause this too, but she's the only one out of the 4 that is missing feathers like this. Their coop is due to be cleaned out here anyway, so I was going to get a chicken safe pest spray anyway (I figured better safe than sorry)

Should I just keep an eye on this spot? I tried to get a good look at it yesterday, and I didn't notice any little bugs or anything...but it's hard to get these girls to sit still long enough to get a really good look

TIA!

 

[14hens1cockerel]

Hiya, so, the patch of bare skin could be caused by a number of reasons.
1) The other chickens are bored and she is their boredom breaker. Do they free range?
If they do not free range, hang a cabbage in their run to distract them.
2) The other chickens may be seeking calcium for laying eggs (the shells) do they have access to grit? If not, buy some because it he'll in their crop and with egg shells.
Hope this has helped,
14hens1cockerel