In a nutshell no..... As for the average weight of a bullcross, there isn't one, they come in all shapes and sizes, in the days when they first appeared on the scene so to speak, genuine forst cross' came out like peas in a pod, between 23/25 inches, the bitches were usually to heavy for anything other than terriermans dogs and the males were uniform in size, now there are various pecentages of bull and greyhound in the mix and size, build and everything else varies.....