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And to get DNA back on everyone takes WEEKS if they don't screw it up. So plan to have the entire litter around until at least 12 weeks old or so, by then you will probably tell by how they look and behave who they are out of if your linebred line has any consistency to it. But you have to separate the pups from mom and each other for hours and feed them and do all this crap so that you can get a clean swab and there is no DNA cells from mom or littermates, as they use swabs of the mouth/cheeks and puppies nurse and always bite each other.

Very interesting Cassandra. Guys has I should have known, if you want to get the straight on how to bred good hounds, just ask a lady. Good luck Jeff, let us know how the pups turn out. Al

Fresh semen will survive over 7 days inside the female in some cases but that won't affect Jeffs plans any .
Mixing the sperm of both sires is a good idea but problems can arise there if both samples aren't of good quality.Old age and being tightly linebred or inbred can affect animals sperm count .Would probably be a good idea to check both males sperm count before the planned breeding .
I guess expense depends on how much money you have but it would cost several hundred dollars to have sperm surgically implanted here .A friend in Idaho spent $2000 having his female implanted with frozen semen.That's a lot of money to me.
Anyway there are lots of things to consider before making such a mating.There are no guarantees how it will turn out .

I'd keep it simple, breed her to 1 in morning and 1 in the afternoon several times. If it works it works if it don't it don't.
You want to find out if the outside line adds anything so why don't you wait to do the dna test till after you train them. That way it's kind of a blind test. It'd be good if you could start them all, that way you'd know you wasn't comparing what could by the sorriest pup off 1 sire to what could be the best pup off the other.