I made a good living as a teenager breeding rodents for sale to pet stores and snake people, and have considered getting back into it at times. But if you get serious about it you have to have good ventilation, otherwise the ammonia will gag you. This guy has a really awesome setup but I've seen ones just as good that were built using Dollar Tree totes and 2x2 framed stands.
I used to feed my dog with raw food, but I found it time consuming and stressful at times. That's why I prefer Canned Dog Food with quality ingredients. Not all canned dog food are healthy and safe so it's better to check the labels as well as the reviews.