Is it safe to set Runner duck eggs under a very broody Chinese Goose???

[bellah1]

​

I have a very broody Goose that has been sitting on her unfertilized eggs for about 4-5 days. I receive some Runner duck eggs in the mail today and I'm letting them rest til tomorrow. I was going to put them in my very full incubator but I thought maybe I should try to put at least 5 or so under her and swap them for her eggs that are not going to hatch. She won't break them right? No more than a runner duck broody would?

 

[Sheepheart]

I would test with one or two to make sure, but I would think she would do fine with them.