Everyone gave some good advice. One thing I have to add, is give him more exercise! Weims are very energetic dogs

from this website

" A Tired Weim is a Good Weim;
An Exhausted Weim is a Great Weim!

Weimaraners were developed as pointing dogs to search independently for game. This trait is revealed in their ability to hunt and run during a full day of hunting for as long as six hours. As Chris Walkowicz notes in The Perfect Match, "This kind of energy will explode if the dog is expected to be content with a stroll around the block and a once-a-day pat on the head." Weimaraners need abundant physical activity plus mental challenges to be content. Hunting, running, bicycling, hiking, swimming, retrieving, and romping through safe fields are all great ways for Weimaraners to exercise. Obedience training and tracking are good problem solving exercises for the ever-active Weimaraner mind. As Margolis notes, "If their pent-up energy is not released in some positive form, they are capable of destroying entire apartments." "