I have tried it yesterday night with 2 pigs and 1 piggy.
It is possible, but if dont want to run over your pig you need to go really slow (like accelerating the 1st speed and stopping).

When you go full speed, by some reason the boar is ran over by the boat, suffer damage and dies. The piggy turn was more efficient but unfortunately a serpent appeared in the way and the piggy disappeared LOL.

So, its possible, but requires a lot of patience, as I dont have for that distance I think better run a wild boar.