Every effort should be made to prevent orphan piglets! Feed pregnant sows well and move them and handle them as little as possible in the last fortnight of pregnancy.
Newborn piglets are not hungry for the first 24 hours of life, as they are born with sufficient supplies for this time. They are also born with antibodies and so unlike other domestic mammals, do not need colostrum to give them all their disease protection. Keep them very warm and dry during this period - a large motherly sow will usually do this for you, even if she has no milk.
Make every effort to find a foster mother (guinea pig).
If no foster mother is available and the piglet is not deformed in any way, give evaporated milk, undiluted.