Looks to me as ditched dogs.
They will look to the main feeding hand as a master, so don't play around, feed and be gentle, be calm and look them in the eye as if you were a border collie.
They could be great, no reason why not.
BTW, I have a bundle of dogs. The alltime favourite of my kids is a "runaway".
And Jackal, I'll sell you, or even give you a dog. Got a great mixture. What do you want your dog for anyway? Kids? Home protection? No hairs?