I saw a video of a bloke at clitheroe auctions with a cage full of them for 60 quid each and they seemed tame ish. At 60 quid though they'll be getting dumped all over when people realise how tricky they are to keep.
A lad I knew used a first cross gwp x greyhound out on the marsh and out on the shoots aswell as working to longnets, lamping etc. I think he wrote an article in the edrd about her.
Give it another couple of months to let the cover die back and the pup to mature then take it places there's rats. Get it chasing toys, rags, fox tails etc on a string while your waiting.
Same round here, they really do just disappear. The odd survivors need leaving alone to breed but the mongs can't help themselves and catch the last couple.
Just been for a look now mate and saw the posts. Hopefully he turns up for your mate. I'd double check with the dog warden too though coz they're hopeless with dates and descriptions etc.
Looking at his build they might have him down as a bull breed?