It's all part of the game. If your co-founders are any good at all they should be getting head-hunted. You just have to keep making sure the idea pushes forwar

It's all part of the game. If your co-founders are any good at all they should be getting head-hunted. You just have to keep making sure the idea pushes forward as fast as possible. If it stalls or the idea becomes uninteresting then the easier it will be for them to jump ship.