I have two dogs - Dexter, a year old, 160 pound English Mastiff puppy, and Louie (aka Lou Dog), a half Basset Hound, half Pembroke Welsh Corgi / Australian Shepherd mix.

Dexter is generally a very good dog, but recently, he has gone from innocently barking (like many dogs do) as people walk by our house to snarling, growling, and jumping on the windows in pursue of the passerbys. He also has recently started to try to attack or at least intimidate my friends when they come in the house, but will immediately stop if they can manage to give him a treat.
What can I do? Why is this happening?

Louie, on the other hand, constantly wants to go outside. He used to be an outdoor dog before I adopted him, and now, he lives in suburbia with me and we don't have a fenced in yard where he can run. I walk him frequently, but he still gets me up in the middle of the night and waits at the door to go outside. When I take him out, he wants to play. If I don't take him out, he begins to whine and eventually howl.
How can I teach him to sleep at night and use the bathroom on walks? How can I teach him to stop "asking" to go outside when he was out only a couple of minutes ago?

Thanks for your help!
~
Mariah, Dexter, and Lou Dog

I have a english mastiff pup 6 months old. Training classes may help you , I would seriously think about it. They can be stubborn so u have to make them understand you are boss, you are top dog in the house. This does take time and patience.
Mastiff's also have different temperments , some more aggresive then others. Most mastiff really really want to be loved by there owner. They are gentle giants. As well as being very protective of home. Try to find a good training classes and lots of patience and it should help. gl