I know it was suggested for a couple of times but pls! They should be able to cross rivers. Maybe that should depend on stamina or endurance or a new stat specifically for swimming. It is ok if they cant at basic q10 but lets say it should be 10 per tile so it takes quite a while to breed them so they can cross some small rivers.
I know that boats with rafts could be used but that is a bit annoying
Maybe they should be attached by a rope so one cant sit on them while crossing the river and has to have enough con to cross too.