My Canadian geese that I have been feeding for years had 3 goslings today but left 2 eggs in the nest. When I got there Mom decided to walk them down to a pond close by (that has snapping turtles)but she left 2 eggs so I took them and put them in with my duck eggs that I have had for about 25 days,..do I turn up the heat for them or what should I do? My question is after the egg gets cold does it effect the fact that it won't hatch? How often do geese have eggs that don't hatch? She had last year that did not hatch,... what am I missing here?