I,m starting to get a few people in my area wanting to buy fertile eggs from me. i get 5 eggs a day, and i,ve got someone wanting 60 eggs, whats the longest you can hold eggs for before putting in incubator?
Your reputation is at stake. With chickens I never incubate eggs over 7 days old and those are kept cool and tilted 2 times a day for optimum viability.
Talk to your customer and explain to him / you could give him a BIG discount with him knowing the risk involved. But remember how he incubates and his incubator are risks that HE takes. There are lots of variables involved.