How could the BEST pups turn out, how could the WORST pups turn out...?

...

ME- Those (different bull-herder types) are dogs from numerous countries, bred for different jobs...

Yes but so similar in other ways.

 

ME- 

No doubt. There will be some pretty massive differences in temperament and particular working ability, across the board.

Some are herding and guarding dogs, some hunting dogs, some police or sport dogs.

Yes your right in some ways. A collie will herd sheep but can catch rabbits on lamp be used for ferreting or long netting . Seen collies guard up farm yards.

 

ME-

I'm right in ALL ways! LOL All-rounders may be something that already exist, and also what I'm after producing- but there is no doubt that some hunting dogs will make useless guards, and some farm guard dogs would be useless for the police or high-level dog sports... Am I wrong?!

 

Planning some experimental crosses between different types of dog, and I have to remind myself to ask this question: 'Potentially, how could the BEST pups turn out, and how could the WORST pups turn out...?'

 

Here's a thought; take your beloved collie who does a bit of everything, cross him with a staffy and it'd VERY likely you'll suddenly get pups that are useless for both herding and guarding. There may be exceptions! Collie x staff (a legitimate bull-herder mix) might still be great for some kinds of hunting, and loads of dog sports, though...

Even potentially for nosework (detection/tracking/search and rescue)