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Pigs move around quite a bit so you would be best to go back this weekend. If you see any goats around shoot them and that will be a feed or two to keep the pigs in the vicInity.

I think they...

Yes, it's pig rooting. It can be quite shallow only 5cm or else deep up to 40-50cm. They much prefer soft ground which usually means fairly level areas on terraces, saddles and tops of ridges. ...