When breeding, make sure your dinos are on passive or hitched. Alternatively put gestating female gacha on a spotp without vegetation..
Baby gacha autoharvest at birth and will hit their mother, as it's unclaimed it will aggro your dinos.
Place some wondering snails in a dino leash in front of a gacha and over fill gacha with stone gacha will collect all of the achatina paste the snails drop. As long as there is stone in its inventory it wont eat the paste.