How do you potty train your 3 month old Jack Russel?

Potty training should be affective in any age. I have trained a deaf, blind 17 year old western terrier (very stubburn breed) I strongly suggest a doggy door. The most importent thing in potty training is. DON'T SCOLD! The dog will get the wrong idea, thinking that you are scolding it for using the bathroom, and try to hide it in an area- often in the house. Instead after feeding it (make sure to have feeding scheduals) take it out and wait until it uses the bathroom. When it does, praise very much and give it a treat. This simple method will take a while.