A dog sale question for the populous

well this is going to be a hard one, I'm no expert but have dealt with the law on this kinda stuff before. you can go get the dog but be careful it his land and he has his rights to do what he wants. If the law gets involved you will have to prove its your dog, he can easily say its his. If you have pictures with the dog it can still be tough. It would of been best to at least get something in writing saying you let him have a trial on your dog but without some sort of identification or paperwork I think it will be tough unless he says he doesn't have the money and just gives it back to you without any further words, good luck hope you get it worked out!!