Forgot to say earlier: Thanks, jlzania for letting me take over this corner of your thread. Didn’t think it would turn into such a thing.
For clarity, I’m rearranging your posts slightly, code_grey. Hopefully, they are relevant enough for you.
Aha! Finally we get the baseline issue that got you on this. Ok, lemme 'esplain:
Antibiotics are one way of managing a common intestinal parasite called coccidia which can cause morbidity and morality in small chicks (the older chickens can generally handle the bug themselves). Another way of managing coccidia is by having fewer birds on a given stretch of ground. A third way is to have just as many birds and accept the losses you suffer without using antibiotics. A poultry producer chooses which way they want to go: Fewer birds but don’t use antibiotics, more birds and use antibiotics, or more birds without antibiotics but more of them die/get sick. Obviously, no one wants to watch birds die from a preventable disease, so most people either choose to use antibiotics or to have fewer birds.
Note I said “managing” problems, not “eliminating” problems.
Ok, yeah. The best method so far to lessen transmission of fecal parasites in the world of large scale poultry rearing is to keep the birds in cages. However, this can only be done if:
- the birds are not very heavy (egg laying birds weigh about 2 pounds when full grown, and they still have problems with their feet from standing on the wire)
- the birds are finished growing (or else you’d have to swap them out between different kinds of cages with different mesh size)
Given how short a time meat birds are alive, how rapidly they grow, and their large finished weight, keeping them in cages is completely unfeasible. Furthermore, changing any of those three features would make raising meat birds massively less cost effective. Keeping meat chickens in cages just ain’t gonna fly.
You just aren’t going to get an environment that is so clean as to be parasite free in any sort of food production setting. There is no way to get the equipment/cages needed to house 10thousand birds sterile every 6 weeks. Also, you have to take insects into account. Good farms will have minimal flies and beetles, but you’ll still have some. These can act as carriers and reservoirs of parasites for the birds. So, some of the parasites will survive to re-infect the next flock.
There are ways to raise birds in nearly sterile environments but they are amazingly expensive and labor intensive. They are only used in research situations where people are developing poultry vaccines and whatnot and need to be absolutely certain that there aren’t other organisms to interfere with the study. In these cases, you generally have 4-8 birds living in a small room with with a dedicated person to tend to them.
Like CrazyCatLady said, there is one legitimate reason to reduce antibiotic use: The more it is in the environment, the more bacteria develop the genes to get around the antibiotic. Bacteria can share genes with each other, so we run the risk of those resistance genes ending up in nasty bacteria.
Large farms would be more than happy to rear their birds without antibiotics, but they would have to reduce how many birds they have on a given stretch of ground. That means they would have fewer birds to sell, so they would have to raise the sale price to stay in business. This is the exact strategy jlzania uses and it works because she has a customer base who is willing to pay more.
So, most people logically conclude, why don’t we all just pay more for our chicken meat and eggs so that the chickens can have more room to run around? What these people forget though, is that an industry-wide rise in the cost of eggs and meat would also increase the cost of every single product that uses chicken and eggs. Every pastry, every can of soup, every tv dinner, every bag of pasta. All of it would be more expensive. For middle-class folks, no biggie. For folks surviving on the edge of the poverty cliff, no good.