Oh they do root
We've noticed with ours that they tend to do it most when young, or when the grass starts to lose it's goodness in the autumn (but sometimes they must just notice something nice smelling under the soil and turf it up
) Generally though, they do far less damage than any of the traditional breeds.
For me, I aim to have the gilts well grown before putting to the boar - usually between a year and 18 months old, ideally 80Kg liveweight as a minimum.
Kunekunes won't be fully grown until they're about 2.5 - 3 years old, but I've found that even in one litter there are some pigs that are always just a bit smaller (shorter in the back and leg) so your little one might never get to the size of the bigger one. It could be that the bigger one is stealing all the food though and bullying the little one - keep an eye on them at mealtimes to make sure they're both getting a fair share
If you can measure their length from the ear to the root if their tail (when their head is up) and their 'girth' (just behind the front legs) it's quite easy to calculate their weight. Measure in meters (so if she's 36 inches, that's 90cm or 0.9 meters
) and here's the calculation
Girth squared, multiplied by length x 69.3 = weight in kilos.
It might be worth just mating the bigger one at the moment and give the smaller one time to grow more before putting her to the boar
I'm not sure where your nearest KK boar is ? I'm over Lanark way if you wanted to use Big Red, but depending on where you are there might be someone nearer - just give me a shout if you want me to find out
HTH
Karen