Likewise; I believe it's essential to discuss things, especially when views differ. Living in a bubble is bad for everyone I think.@Perris Not trying to argue only discuss. I always enjoy reading your posts. I like hearing opinions from our neighbors across the big pond. Thanks for your interactions here. Yes, I do wish they would get the poop out of the feed.
Another oft overlooked corner concerns broilers, which people will eat, so another health hazard in waiting. The recent habit of re-using the same litter for generations of broilers - each cohort of which might only be on it for 5-6 weeks, but it means for all but the first cohort of newly hatched chicks, these bundles of fluff are coming into it after numerous others have passed through, and they do, of course, eat it.
See e.g. https://extension.uga.edu/publicati...&title=litter-quality-and-broiler-performance
esp the sections on built-up litter management and litter amendments.
And of course they don't like it. (Here's a paper of the NSS type

https://www.sciencedirect.com/science/article/pii/S016815912300028X )
As some backyard chicken keepers complain about the smell of ammonia when they clean their coops, shoppers complain when they see ammonia burns on broilers' legs and feet (if they have not been cut off before sending to supermarket, to avoid it), but what about the damage from the same unsanitary environment that goes unseen on the poor birds' insides (especially their eyes and lungs)? And what about the hidden microbial risks that arise from living 24/7 on what who knows how many cohorts of predecessors expelled as waste?
Industrialisation of meat and dairy production is the problem. Too many animals packed into too little space, fed too concentrated feed and creating too many waste products in that self same little space.