Is it possible to train a 2 year old spaniel?

[Lola K]

We got a dog from the Animal Shelter 2 monthes ago. He is a 2 year old cocker spaniel, male, and only knows how to sit down when told to. He is a kind gentle dog and I was thinking on training him further on. This is my first dog and i have heard that adult dogs do not train as well as puppies and he is already 2 years old. I want to train him the down postion, how to heal because he always pulls on walks, and how to "wave" with his paws\. I have lots of books on training but i was just wndering if it is possible to train those three basics to him and about how much it will take. I dont want to overwhelm him with these new commands because he already is 2 years old. If he happens to learn these right, then i will train him the "rollover" trick. I want to know if it is possible to train him thjose three basic commands and about how much will it take? I work from 8:00 to 3:00 so i will have lots of time to train him. Please help! Thank you!