Keeping a Happy FarmOne of the first things to consider when you want to put two different types of animals together is whether they will actually get along in the first place. Like humans, some animals just don't get along, no matter how hard you try. Other than that, you also have to consider fencing, compatibility, and the most important - food.
Many breeds can't share foods because whats nourishing to one is poisonous to others. Take, for example, pigs, chickens, and sheep. Pigs and chickens need copper, but sheep can be poisoned by even grazing on a pasture that has been fertilized using pig or chicken manure.