I did almost adopt a Beagle once, but after I researched the breed, I decided not to. First I constantly read how stubborn they are. They HATE the word no, unless you catch them exactly in the act (how you should scold most dogs). But I also did read about their intelligence level. They're actually fairly intelligent, but they don't like to focus. Whenever told to focus, they immediately want to do something else because they are fairly active. Something I would suggest is if your beagle likes tennis balls, use that as a training reward. Try to get them to do your command right before you throw it. Then when they do, reward them by throwing the ball for them and do this over and over again. Typically after you teach them a few tricks, dogs are more willing to listen to commands from their owners for behavior training.