this from Cowboy on another thread:
Folks, I was going to discuss this very topic soon, but now I see it in print, and while I am waiting on the embryo freezer to finish, I will let you know a few things I am concerned about -- meybe for nothing but any way -----
First of all, with today's some what limited quality semen on some of these matings we all use, I am personally not too keen on waiting an addition 20 minutes ( which will be longer by the time you prepare the set up) to go breed a cow with already challenged semen. That does concern me some.
Secondly -- unless these KITS come with a new straw in the kit -- you will NOT be able to re-raw the semen back into the old straw -- reason being -- the cotton plug end has this set up -- cotton -- PVC powder - Cotton. Once this is wetted, it becomes impermeable to further asperation, simply put -- it PLUGS the straw to prevent any thing from coming out or going in!
Unless they send you a new straw, this is going to be nearly impossible to pull back into the straw -- plus you will need a 14 gage needle to fit the 1/2 cc straw -- a 1/4 fits a 16 gage needle.
I am getting at least 5 different sets of this product sent to me for testing from a few of my customers. I will most definately report back as to how easy it was, how it all came together, AND most importantly -- what kind of results we achieved from fertilization after this trauma to the semen. We won't know how well it worked as far as sexing goes until much later at calving time!
As if we do not have enough challenges any way with a few of these donors, now this. I am excited if it will work, but it could be a nightmare if this just takes away the last little bit of GOOD from some of this semen. Not running it down yet, but I am concerned to start with with no direct experience. Will let you all know soon, say in less than three weeks I think.
Smile -- sun is shining here finally!
also this LINK: http://www.cattlevisions.com/heiferplus.html