Re: Using a blender
No. It exposes more surface area to the air, which denatures nutrients, but if you do it fast and freeze it, the loss won't be too much. It's better than not getting the organs (esp liver) into them at all, certainly!
Just re-read that -- so you're not just blending the organs, but the whole meal? Well, in that case, then yes, you need to be very careful and supplement w/ taurine, b/c there WILL be taurine loss in ground meat. Why do you want to do this? Also, how will they get bone, as a blender will not grind bone?