-You have to keep them at 95 degrees their whole life if you want them to grow
That's total crap- mine are outside right now in Minnesota, where the temp has ranged from 80 during the day to 32 at night. Not only do I think 95 degrees is not necessary, after the first week you would start loosing chickens because that is way too hot for them- mine are panting any time it gets above 75. ALSO they wouldn't grow as fast because chickens eat less when they are hot, as metabolizing food makes them hotter. I've raised broilers in the heat and in the cold, and IMO they do better in cold than heat by far.
-You need to feed them corn oil everyday
I don't know if this would hurt, but I've never done it. In my educated opinion it would probably result in a lot more fat on the carcass, and do you want a lot of fat or a lot of meat?
-You cannot let them outside
Again, total crap. Mine are outside all day in a tractor (with shelter for shade and to keep the wind off). The last two batches I processed (at 8 weeks or just under) were 8-10 lbs live and 4.75-7.5lbs dressed. They do better outside because they get fresh air and sunshine and don't have problems with ammonia from the poo burning their feet or bothering their respiratory systems. They also stay cleaner and it is my opinion that raising them outside (whether in a coop with outside access or in a tractor) is more humane.
-You can feed them gunpowder and it will make them fat (I'm not planning on doing this even if it's true)
IDK, but that sounds like an old wives tail, and one that is a bad idea (because they aren't all bad...).
-They will eat each other if you don't separate them into individual cages
Also crap. Broilers are some of the most docile chickens out there- as long as they aren't crowded and get enough protein they won't peck or cannibalize. I did have one batch that seemed to overall have more chicken-y instincts than broilers regularly do.... which was generally good, but the roosters fought a little more aggressively than broiler roos normally do, and three (out of 50) got bloody combs (this happened once, though, like they had bloody combs one day out of the 8 weeks). But normally they don't bug each other.
-You keep lights on them 24/7 (Not just for chicks?)
This could explain why they would eat each other. Chickens get cranky when they don't have dark time to rest, and could peck each other for this reason. Even industrial chicken gets about 3 hours of dark to rest (which isn't enough, IMO). If you're raising them in winter, though, you may want to provide lights for them in the morning and evening, because they won't eat once it gets dark, and if you're trying to hit a target weight the shorter daylight hours may slow down weight gain. But I would put a light on a timer (or do it manually... I would just forget, and timers are like $4) to come on from like 6am until dawn and to come on again from dusk until like 9 or 10. That gives them plenty of time to rest at night. However, I have no supplemental light on mine (and at the moment they're getting just about 11 hours of sunlight) and they're growing fine.
Hope that answers your questions... I know I get a lot of advice from the "old timers" (ie my dad, grandma, and mother in law) on how to raise chickens, but when it comes down to it they don't know a fraction of what I know about chickens (not because of my superior intellect, but because of the interwebs and this site!). So I take what they tell me, weight it against what I know (or look it up), and make my decision based on that. For example, my mother in law told me that her MIL (because my MIL never raised chickens, but she lives next to her MIL who did) only fed her layers Milo (sorghum) and grit, and that's it. Well, they probably were able to survive on that, but it would have cut their egg production at the least and at the worst caused problems like pecking and cannablism and any other problems resulting from low protein and lack of micronutrients (and I asked- they weren't free ranged so couldn't make up for the lack). So it's not something I would ever try.
