Roosters will crow at any time during the night if they are disturbed by noise or light. That I know from long experience!

If the people who raise backyard animals are careful to properly cage or fence their critters, there are few problems with predators. Tho I have lost cats to coyotes and a few chickens to hawks and one to a bear (I think), that's over many years so the events aren't common. The worst problem I've ever had is with neighbors who let their dogs run free.

The best back-yard food source I know of is rabbits; quiet, don't smell (if cages kept clean), provide good manure for garden, and are inexpensive. The problem a lot of low-carb people have with rabbit is that it is a very low-fat meat. However, one doesn't have to eat it alone. This morning I had bunny sausage, 2 eggs and cream. Yummy, filling, and all but the cream produced at home. I wish I had the pasture for a cow and pigs, then I'd be much closer to being self-sufficient.