Help with a runt that doesn't seem to be growing

[Wol1]

We had two little ones last year. I put them in a separate box for a few days so they could get all the food/water/rest they needed. They were much stronger after a few days so we put them back and they were able to hold their own. They are still the two smallest, although one takes advantage of that to fly over the fence to eat the grass that truly is greener. The rest stand there watching her, complaining.

 

[flytime]

I had a problem with one of my six being half the size of the others, acting shy and lethargic. Started adding probiotics last Thursday and saw a little improvement. Gave her some hardboiled egg yesterday morning and WOW, what a difference! She's been like a totally different bird.

 

[Charisha]

I had one I was worried about too. She looked nothing like her sisters. Small, very few feathers. She still looked like a fluffy chick when the others were covered in fethers. But she caught up! She still isnt quite as feathered as they are and she is my smallest, but she is almost there.

Like this girl? (Hattie is the one on the feeder in the first pic, with a salmon faverolle a week younger in the second pic)