When breeding kubrows, size is always random.  Always.  The size of the puppy that the imprints are from have absolutely nothing to do with the size of the puppy you'll get. So if someone is selling "Omega" prints and wants hundreds of more plat for them, walk away.  Quickly.  He is trying to scam you.     If you want an Omega sized puppy, there is only one way. 1)  Get prints that you like either by buying them or breeding them. 2)  Breed those two prints. 3)  If t