I had pigs and chickens in a barn with a sun lamp and growing a mix of hay, potatoes and corn and they were breeding constantly.
Only problem I realised after a while that the pigs eat chicken eggs so had to take care and pick up eggs before that happened.
Sometimes the animals would wander out of the barn , seems to happen if they run out of food.
In the end I decided it wasn't worth breeding them like this indoors with all the work required to grow the plants and feed human meat to the pigs. I would get more food/money just selling the human meat and growing food for my colonists instead of growing food for the animals.
Next time I'll try some kind of outdoors no-roof barn where they can eat grass. But this was on a tundra map with no food outdoors.
Only problem I realised after a while that the pigs eat chicken eggs so had to take care and pick up eggs before that happened.
Sometimes the animals would wander out of the barn , seems to happen if they run out of food.
In the end I decided it wasn't worth breeding them like this indoors with all the work required to grow the plants and feed human meat to the pigs. I would get more food/money just selling the human meat and growing food for my colonists instead of growing food for the animals.
Next time I'll try some kind of outdoors no-roof barn where they can eat grass. But this was on a tundra map with no food outdoors.