Threads like this always make me realise how progressive my grandfather was, and my father is. I think I was around 9 before I worked out that not every farmer does things the way we do.
We'd been a dairy farm for 60-70 years, but never killed male calves at birth, or slaughtered for veal. They were raised with the rest until 18 months ish. They went to the slaughterhouse for beef then. Some were sent to neighbouring beef farms for foster calves. (As an aside, a cow with a calf at her foot is really dangerous, and while I can't remember the exact figure, they are the cause of a high percentage of livestock accidents on farms.)
We also gained a bit of a reputation for taking on all the waifs and strays. We've had blind stock, underweight stock, a semi-paralysed bull, and what was possibly the worst case of neglect and malnutrition I've ever seen. Careful care from Dad meant that they all gained weight, and were well looked after before they either went to the factory, or in the case of the bull, fulfilled his breeding duties in a highly controlled environment.
We have our own chickens, so I've never had to wonder where my eggs come from. If I do need to buy, I buy local from a free-range flock, or certified organic.
We have sheep as well. Ram lambs are raised with the girls. Any lambs not suitable for breeding are sent to the slaughterhouse when they reach weight. They're exclusively grass-fed. The ewes are getting nuts right now before lambing starts. The sheep are pretty used to us, but even then they're still sheep so can be a bit flighty, so I kept an elderly ewe in the flock. She's such a pet, we use her to direct the rest to go where we want, and keep them calm. We'll be looking to hand rear a few lambs this year to act as her replacement when the time comes. (She's about 8-10 years old, and she won't live forever, but she will live out her whole life here)
It's very possible to use conventional farming methods, while having a high emphasis on animal welfare. However, yes there are people who will only look for shortcuts, or a get rich quick scheme.
Heyha All my girls were treated for fly-strike, but we still had a few that really suffered. Can I ask what you used? Our stuff clearly wasn't very effective! I ended up re-dipping most, and spraying fly repellent.
We also had a late lamb last year, but she was the bloody ringleader of any trouble! Still is. She's gorgeous, she knows it, and she has the attitude to prove it. We call her 'the baby'.