The importance of pig bedding
24 01 2008
When prospective buyers of weaners contact us about keeping outdoor pigs for the first time, they often focus how they should feed them and fence them in.
They are often surprised when I tell them after feed and water (more on which another time), the most important routine job is ensuring the pigs are well bedded — day in, day out.
Cold, wet pigs are not happy pigs, healthy pigs or growing pigs. They also need to eat more as they’re burning energy to keep their internal body temperature sufficiently high to survive.
Pigs, and particularly piglets, must have a warm, dry environment where they can escape wind, cold, rain, sleet and snow.
The best way of finding out if your arcs and huts are warm enough, dry enough and draught free is to strip off all your cold weather clothing — down to your underwear if you dare - and get inside.
Ask yourself if the arc feels noticeably warmer than outside? Does it warm up reasonably quickly from body heat alone? Are there breezes blowing over your skin?
When you went inside the hut did it feel noticeably better than the outside environment?
If it doesn’t feel comfortable, the first thing to do is close off any holes to prevent draughts.
Our arcs have skids to the sides, which means the end crossmembers are four inches off the ground and allow cold air to blow in under the end panels.
We pack large stones under the crossmembers, then earth them up. But pigs will nose these out of place so you have to check at least once a day and close any fresh gaps up.
Some arcs have air vents, which need to be closed in cold, windy winter. Always check that they are indeed closed — never assume that they are.
Our arcs have lifting holes cut in the front and back walls. These also need to be blocked and checked daily.
Make sure the arc is correctly sited.
In the northern hemisphere, try to position arcs so the entrance is facing at least partially south with the bulk of the hut backed into the prevailing wind.
Our prevailing winds are from the north-west, so we position the huts with the back wall into the breeze and the entrance facing south-east.
On a cold, windy morning, the pigs like to lie in the entrance with the sun shining on them and watch the world go by.
Again, check the positioning daily. Our boar and his sow/s of the moment often have a bit of argy-bargy and move the hut around.
In more northely and exposed parts of Britain, I think insulated arcs are a must, particularly for sows with piglets.
The inside temperature is more easily maintained at a comfortable temperature and much less bedding is required.
Less bedding is not only a cost saving, but it can also reduce the chances of piglets being crushed as they can more easily scamper out of the way when the sow lies down.
I prefer straw for bedding in arcs as the airspace between the stems and inside them adds enormously to the insulation value.
Wood shavings are fine inside hard-floored, warm buildings — and much easier to muck out — but straw is much better in an arc, especially one without a floor.
We use a whole, small square bale of straw in a 6×8ft arc, breaking it up with a muck fork and building it into a nest.
The straw is packed high against the side walls with a hollow in the middle where the straw is about four inches deep, which quickly packs down to an inch or so under the weight of a pig.
If you’ve reached this point, hopefully you’re still in your thin boilersuit (or skivvies), crouching inside your arc, because now you have to carry out your next assessment.
Sit on the bed of straw or, better still, lie down on it for a few minutes.
Do you feel damp? Are your clothes developing wet patches?
If so, your pigs will be getting wet and if they’re getting wet, they’re getting cold.
The next step is to identify the cause.
If the dampness is simply from a wet pig, all you need to do is remove the wet straw and replace it with fresh, dry material.
If it’s seeping up from the ground, then you need to consider the position of the arc, which should be on slightly higher ground than the surrounding area to encourage drainage.
Arcs should never be at the bottoms of hollows or slopes.
If the water is coming in through the roof, then you need to either find and fill the holes, put sealant or waterproof washes under the fasteners, or re-roof with good overlaps between the joints of roofing panels.
And once again, check daily and check again.
Next, safety. Remember that if your checking or working on an occupied arc, especially one occupied by a sow and piglets, play safe.
You should have someone else around if at all possible, you should have your pigboard to hand, you should have escape routes mapped out, and you should do your checks when the pigs are feeding.
We use a minimum of a square bale of straw per week for an 8×6ft arc, and two bales for 8×10ft arc.
This rises dramatically in wet weather as the pigs tramp mud and water into the arcs.
It rises dramatically with certain sows who are found of “housekeeping” — they like to throw all their straw out every few days.
It rises dramatically when Graham and his sows have a tiff, moving the hut 10 feet or more and leaving the straw exposed to the rain.
It rises dramatically when the lazy Dolores decides to pee in the doorway, instead of going out in the cold and rain (which infuriates the other sow and/or gilts sharing the hut with her, so you then have a lot of biting and biffing to content with as well).
Pigs deserve good bedding and it doesn’t come cheap. We spend at least £15 a week on straw (at £2.50 a small square bale) on average, higher in winter, lower in summer, so this has to be factored in when doing your costings.
It’s not area for shortcuts and it’s the pigkeeper’s responsibility to give their animals a warm, dry environment in which they can thrive, be comfortable and, pragmatically, perform well enough to pay the bills.
If you can’t spend a comfortable 15 minutes in minimal clothing in their arcs, then neither can your pigs.

That’s a lot of straw!
I know what you mean about the damp though…our ducks (of whom you must be heartily sick by now) are expert in either fouling theirs, or trampling the wet into it…
Stoney,
Is it not cheaper for you to buy round bale straw?
We bought 12 bales off the field for 5 pounds each delivered.
Small bale hay and straw is unfortunately overpriced due to most people with horses using it. We do not have a tractor either and we move them buy hand (roll them) we stored so many inside and the rest outside under tarpaulins and even these have stayed nice and dry. We have 23 sheep, 1 cow, 1 yearling heifer and a 5 week old calf. We bed down every day and still have 6 bales left.
There’s a lot more than cost involved in deciding to go with small bale straw.
Our outbuildings are more 130 years old, so don’t have doorways large enough to get a large round bale through. One hundred small bales, on the other hand, takes up only half the floor area of the hay shed when stacked six deep.
Even if we could fit round bales in, we’d have to roll them out, around the buildings, up the hill, along a track, up the hill some more, and then into the respective pens. Hard work in good weather but in six to eight-inch deep snow or through mud? We take small bales out on a sledge when this happens.
We could store large round bales at the top of the hill, under tarpaulins, but they’d be in a very exposed location. We have sileage up there at the moment and despite being held down with heavy netting, three months of winter gales is shredding the wrap. We’ve even had 8×6 arcs blown over and the roof of a hut blown off — despite being weighed down with a couple of hundredweight of boulders and logs. How long would tarpaulins last and how much rope and ground anchors would be required?
While I can roll a large bale on my own, especially on the flat, the Other Half certainly couldn’t. When I was recovering from my broken collar bone, she did the strawing up and could not have done it with large round bales.
As for numbers, we usually have 20-30 pigs at various stages of development, although we’re enjoying a drop to 15 at the moment. We also have 32 chickens so their five houses and breeding huts also need straw.
Our decisions are never based on cost alone, but on the whole picture.
I forgot to say the cost is not down to the equestrian set. We were paying £1.50 a bale up until last harvest and were expecting some rise due to higher fuel prices. However, we now have to compete with the biofuels market as straw-fired boilers come into use. The batch-fired models use 10-12 small bales a day (equivalent to about 60 litres of oil).
That’s really pushed straw prices up, but an interesting consequence is that the rise has made straw less cost effective as a fuel — for now!
Last January, prices were £1.50 for small bale straw, 33.94p/l for red diesel and 30.5p/l for heating oil.
Current prices are £2.75 for small bale straw, 50.5p/l red diesel (52.25 from Scottish Fuels!) and 43.5p/l for heating oil.
Last January, it would have cost £15 a day to run a straw-fired boiler for a day, while the equivalent oil cost would have been £20.36 for red diesel and £18.30 for heating oil.
This January, it would cost £27.50 a day to run the straw-fired boiler, while the oil equivalent would be £30.30 for red diesel and £26.10 for heating oil.
If fossil fuel prices rise faster than agricultural/equestrian prices, then straw is going to be sucked into the fuel market. If agricultural/equestrian prices rise faster, straw is going to be sucked back into animal uses.
The same thing is happening with vegetable oil. At the moment, there are a lot of expensive, new biodiesel plants sitting idle or running at low capacity as the food price for vegetable oil is higher than fossil fuel prices.
When fossil fuel prices rise above food prices, then the opposite will happen.
Until things stabilise, which could be a fair way off, then there’s going to be a lot of price instability, supply shortages to one side or the other, and difficult decisions to be made (a straw-fired boiler looked like a good investment this time last year, but looks less so this year; biodiesel plants looked a good bet a year ago, but less so now). And note, I’m only talking in terms of cost effectiveness - I’m deliberately leaving carbon neutrality out of this equation!
really useful advice - thanks stoney. Unfortunately the prevailing wind is SW down here.. I woud say, so might have to adjust things a tad to suit.
Would facing the entrance east by south-east work? That would put the wind onto a rear quarter and still allow some morning sun to shine in (if there is any). The pigs do appreciate it, especially when it’s been a long, cold winter’s night.
If you have southerlies as the prevailing wind, then it’s worth considering a windbreak as well as angling the hut to the east or west.
We can’t get any straw in our part of Australia at the moment. The last available straw was last season and it was up to $12.50 per bale. At the moment we have to use sawdust - I did contemplate using lucerne but it is now also difficult to get and is now up to $22.00 per bale (and that is not high quality). Bit of a problem as I love to use straw for our animals and poultry as well. Hopefully there may be some available before our winter sets in.
Was that big bales or small? If big, then $12.50 (about £5.50) is about the same as it is here. If it’s for small bales, phew!
That is for small square bales stonehead. Yep phew! Large round bales are more in the $55.00 plus bracket.
So how many straw bales would you use in an 8′ by 6′ arc and how often do you clean it out and replace it?
Thanks,
Dave
(yes a newbie!)
See above: “We use a minimum of a square bale of straw per week for an 8×6ft arc, and two bales for 8×10ft arc.”
If the arc has a wooden floor, sweep and shovel the old straw out weekly.
If the arc has an earthen floor, the straw will be walked and rolled into the ground so you can’t remove it. Instead, you move the arc every month or so, cleaning and disinfecting it at the same time.
If you need to cultivate the ground on which a hut has stood, you’ll need to break up the straw and earth mix by mechanical means or leave it for about two years until the straw has rotted down. Either that, or plant directly into it.