Is there a size guarantee for a miniature pig?
No, but the size of the parents as an adult are what size the piglets should grow to or will be smaller. Even genetically breeding miniature pigs smaller and smaller they still need to be fed correctly according to their size otherwise their body will grow bigger to accommodate the extra weight. The Boar (father) of the piglets should be genetically smaller than the Sow (mother). Then the piglet should grow to the size of the mother or genetically smaller. When you get your piglet, as long as you following the instructions given to you from the breeder, you should not have a problem with your miniature pig.