I keep chooks, ducks, geese and turkeys. I did have guinea fowl but ate them as they are very very noisy. All birds come with some issues, chooks can be noisy if you keep a cockerel, they have red mite and if you are not careful can attract rats. Ducks are messy and can turn a hoof-print into a pond in a winter. They do however clear a huge area of slugs in short order. If you are after ducks eggs, Khaki Campbell's are the bird, if meat is the preference Aylesbury are a good choice. Geese too are noisy buggers and you really need a bigger area for them. Turkeys are useful in that they also clear slugs but will also keep the grass down better than the ducks, especially couch grass which is a nuisance here. Another very easy option if meat is what you are after, would be rabbits. One buck and two to three does will give you some fifty to sixty rabbits a year. Does not sound like much but if you have breeds such as the NZ White you get a good sized beast. Again, easy to look after and if land is available it just requires an area to be fenced off with chickenwire and hutches for security. Lots of options out there for those who may choose this lifestyle.