got on really quick to reply cos I've had the same problem with Gonzo... he still sometimes stops to chew the ball or goes to get the ball then plays "catch me if ya can" with me. ;P its all fun.

with your labbie, try tossing the ball, wait until he picks it up and turns toward you, then yell in a super excited voice "bring, [doggies name]!".. then run the other way. when he brings the ball to you, and he will, praise him and make a big deal out of it. Also, dont remove the ball from your pups mouth immediately when he brings it.. just wait for him to drop it, then grab the ball and repeat. Its not really "programed" into any dog to retrieve, you've still got to teach your pup what you want from him. be especially lenient about fetching with a 13 week-old. its totally fine for them to want to just play around at that age ^.^ have fun with your pup!