Is it bad that I don't walk my puppy everyday?

Especially with a breed like westies, which are very independent, as long as he has his garden time and play time you probably don't need to walk him much at all! He's getting his exercise, and as long as he isn't being destructive or acting up, he's probably perfectly healthy. Keep in mind, though, that walking is important for socializing, leash training, and often helps maintain the bond between you and your dog. If walking doesn't work for you, try to find an off-leash dog park in your area. Playing with other dogs is a great way to socialize and tire him out and will probably make him even happier! Good luck!