I get where you are coming from Andy,in my reply I stated what if any antibiotics are used.
the quote you supplied from the farm states none are used and that is a great start,however.
regardless of fowl or beast,you cannot keep them that close together in those numbers without losing a percentage to diseases and diseases spread like wild fire in an environment such as that and the potential of losing the whole herd/flock is a very real reality,it is not a matter of if,it is a matter of when.
a good example is here in Iowa a couple of years ago,farmers were losing pigs by the millions due to a disease of some sort,( please forgive,I dont remember the name ) and they lost millions of birds to a disease from what was believed to be spread by geese and ducks flying through.
non of that would of happened if they were not housed together in those kinds of numbers.( example,we have two chicken farms near me,each has over ten million birds in them,PU!! )
a good example exists with us humans,if you live in a large apartment complex or work in a huge office environment,guess what?? the doorman shows up at work one day with the flu,a week or so later everyone has it.
I know this is not avoidable as it is in the air to begin with but when people or animals for that matter are separated by a distance,the severity or density of the spread is held to a minimum ending it sooner.
I simply wanted everyone to know what they could be up against when looking for supposed range free critters.
Andy,just mixed one up cheers to ya !!!