At what age will my Drake be old enough to mate with my female duck?

[randerson846]

I know I was think about giving them about a week but Im hoping there may be another one fertile, as they are a bit covered in poo lol, and I might have missed it.

 

[randerson846]

Ok so I have found a person, who i can buy 10 ducklings, of they White chilterns, has anybody ever had these, and he also had 8 geese eggs, which I'm going to buy of him, and he said he would throw in some ducks eggs aswell for me, but here is the problem, I have the 5 duck eggs in on day 5, I'm pretty sure only one is fertile, but I only have one incubator, What do I do, don't geese and ducks take them same length as ducks to hatch so I can put them in together but what do I do about the one duck egg that I think is Fertile, should I put it in with them, and let it it hatch and when it does take it out, or should I put it in the brooder, and mist it? Or should I just take it out and l throw it away?