yes!
Definitely not. Dogs will learn very well at any age, but better when young. As long as you train them good.
Honestly, it depends on the dog. The teper and age have to do with it too.
Get dog mats, take your dog outside frequently, and reward your dog every time it uses the dog mat.
You should start training you dog at the age of 6 to 8 weeks, as long as it is weened from it mother.
No. With consistency and proper training methods, tools and rewards, a 3 year old dog is sometimes easier to train than a puppy.
When it is a puppy. To gain it's respect you must train a dog at a young age no matter what reason. You must help the dog along with it's training. Hope this was helpful.
It depends on the dog and the dogs age. For example a puppy might not learn as fast as a 2 year old dog it also depends on how long you train it.
Training is the best investment you can make in your relationship with your dog. You'll need to do your homework first, though, to learn how to communicate what you want in a way that your dog will understand. Stay consistent and patient, reward your dog for getting it right and remember: you can train a dog of any age. more information: http://dogtime.com/training.html
All dogs will, do, and need to chew. However, if you train your dog at an early age not to chew, they will not.
If you buy a dog house, the dog will not use it until you train it to go in the dog house.
Depends how mature but no younger than three
The best time would be when your puppy is about 4 or 5 weeks old, or until the puppy is old enough to be away from its mother.