i recently got a german shorthair pointer pup. he is about 10 weeks old.my dad used have rabbit dogs and i used to love hunting woth dogs. i got the puppy for free because somone who raised them moved and had left him in a cage on the door step when they moved which i think is quite cruel. the dog is a purebred and has already had its tail cut and its dew claws removed. my question is can this dog be trained as a bird dog and how do you train one or how old should he be before i send him to a trainer to be trained?