I use it for the horses.
It is lovely stuff very absorbent (much much more so than shavings) and not dusty,
But, it aint cheap, I mix mine with wood pellets. I would think it would be a very expensive bed to give a pig unless you have a private supply.
It does rot down very quickly into amazing compost tho.
It is also eco friendlyas it is made from the stalks of the oil seed rape, the seeds go for oil, the fluffy woolly contents of the stalk can be used for clothes or insulation(my stables have battens made of a mix of hemp fluff and prison uniforms chopped up!) and then the outer stalk is dried and shredded for hemp bedding.