Chickens with runny stool could it be the diet?...

[shan04]

Idk how many as my chickens free range and I have over 80. But even some of my rare penned up chickens are having runny stools. I was going to do a round of corid then wazine but got to thinking I wonder if it's their diet. Everyone eats a mixture of layer crumbles mixed with crimped oats and black oil sunflower seeds. Sometimes when my feed store is out off crumbles I'll get pellets but it's the same brand. Is this feed mixture ok or a possible cause to the runs.

 

[barred2rock]

You could try fermented feed to see if it stiffens things up. Although, it might be a pain in the backside with 80 birds.