Space Requirements for Pigs: Start Here

If you’re thinking about bringing a herd or flock of animals onto your homestead, you’ll have a lot of work to do before that day arrives. The biggest job is figuring out how much space they’ll need and if you’ve got enough for them to live comfortably.

When it comes to raising pigs, they are something of a unique case. They need a good amount of room, but maybe not as much as you might be thinking based on their size when fully grown.

Pigs are also pretty comfortable living in very close confinement if kept indoors, which can make your job a little easier. But keeping them in a pen versus letting them free-range are two different things that will require vastly differing amounts of space per pig!

To help you figure out how much space you’ll need for your new herd or a planned expansion I’m bringing you a guide on a pig’s space requirements…

How Big a Pen Do You Need for 2 Pigs?

Anywhere from 16 to 40 square feet (1.5 to 3.7 square meters) per pig, depending on their size and the breed. Keeping pigs in a pen means you’ll be feeding them day in and day out, so they don’t need nearly as much room to roam and find food.

Generally, plan on a single pig needing between 8 and 20 square feet (0.8 to 1.8 square meters) per head depending on their size. You can calculate the proposed size of a pen simply by multiplying the number of heads in your herd by a figure in that range.

Also remember that any pen you plan on keeping pigs in should be longer than it is wide, rectangular; pigs tend to defecate in a designated area and stay away from it the rest of the time, so keeping them in a longer pen makes this easier…

How Much Room Will 3 Pigs Need in a Pen?

Anywhere from 24 to 60 square feet, again depending on the size of the pig and the breed according to the guidelines discussed in the previous section.

What About for 4 Pigs?

32 to 80 square feet, depending on the size of the pigs in question. Larger pigs or breeds will need more room, weaners, feeders and mini pigs, obviously, a lot less.

What Size Pen Should You Have for 10 Pigs?

You’ll need between 80 and 200 square feet in a pen for 10 pigs. Keep in mind that as the size of the herd grows, it pays to have a little bit of extra space, so 10 pigs is my personal “breakpoint” for increasing the space per head if I’m able.

Giving your porkers extra room to turn around, move around and have a little bit of extra space to poop is beneficial. However, for younger pigs don’t be surprised if they still sleep huddled together even if they have plenty of room to spread out.

How Much Room Will Each Pig Need in a Shelter?

If you are keeping your pigs indoors full time, like in a barn or other large building, 50 square feet per head, for adult pigs, is generally adequate to cover all use cases and activities.

But if you keep your pigs outdoors much of the time and only provide them shelter against cold and rough weather, they can get by with as little as 8 square feet (0.8 square meters) per head on a short-term basis.

How Much Land Do You Need Per Head for Free-Ranging Pigs?

Free-ranging pigs is a different sort of calculus compared to keeping them in a pen or indoors on a full-time basis.

As a rough, and I do mean rough, guideline you can keep two or three fully grown adult pigs on a half acre, or a quarter acre if your land is rich with forage and other foods that they like to eat.

But this ratio breaks down quickly depending on many variables, and even among adult pigs sizes vary dramatically, and the size of a pig directly corresponds with how much food they need.

Because of this, a better way to calculate the stocking rate of a parcel is to plan on keeping between 3,000 and 6,000 pounds of pig on an acre, again depending on how nutritious the forage is.

This allows you to easily figure out how many of your pigs, and at what size, you can keep on your land.

For instance, you could keep between 75 and 150 weaners on an average acre assuming they weigh between 35 and 45 pounds, or between 5 and 12 adult pigs, be they sows or hogs that weigh between 450 and 650 pounds.

Performing a nutritional analysis of your pasture will better inform your stocking rate determination. Don’t forget to plan for rotation so you can give your land time to recover; pigs are extremely destructive!

How Many Pigs Can You Keep on an Acre of Woodland?

A rough guideline for free-ranging your pigs in a silvopasture setting is 10 to 12 adults per acre. Most of these environments provide ample nutrition and plenty of food sources that will prevent competition and also help your pigs grow healthy and thrive. Some folks keep up to 30 per acre, so the answer varies, but I wouldn’t recommend it – let me explain…

If you aren’t going by stocking rate, most forested pastures can support between 5,500 and 6,000 pounds of pig per acre. As always, you can have more heads-worth of smaller breeds or weaners, or fewer large breeds or adult hogs and sows.

Do be careful to rotate the pasture regularly, though, because you want to avoid your pigs severely damaging the trees and other plants.

Pigs have a way of causing persistent damage to woodlands that’s difficult to correct, and part of the reason why invasive, feral hogs are such a big threat to the environment. They will dig up roots and strip bark from trees, sometimes completely girdling them. That will kill a tree!

Restoring silvopasture takes much longer and more effort compared to grass and weeds alone, so you need to treat your wooded pasture “gently” if putting pigs on it: More frequent rotation and giving the land more time to rest can keep your silvopasture viable for a long time.

Space Requirements for a Sow with Piglets

Both a sow and her piglets will benefit from having lots of room to move around, get comfortable, and also allow you a little extra space to move around and care for them as needed.

A smaller, separate farrowing pen of about 125 square feet (11 square meters)) is usually enough, but you can go a little smaller or a little bigger as needs require. I’ll call 100 square feet the absolute minimum, and 150 square feet adequate for all but the largest breeds.

Remember the Rule of Thumb: Bigger Breeds Need More Space

Whenever you are assessing your herd and individual pigs for space requirements, remember this rule of thumb and you’ll never go wrong: give larger pigs more room if possible.

If you are planning on slaughtering pigs as quickly as you can, it might not make much difference…

But, hogs that have ample space to move around and get a little exercise, and just be more comfortable generally, will always show better performance and produce pork of higher quality compared to those kept in extremely close quarters.

It’s easy to believe that pigs simply don’t need any more room to comfortably lie down because they tend to be a little lazy, but if they’re constantly rubbing against each other, then fences, rails, panels, and more this will cause injury that will result in stress, and that will hurt gain performance.

Chances are you don’t like being cooped up, and I can promise you that your pigs don’t either if they have any choice in the matter!