My Labrador puppy who is 13 weeks old is chewing everything he can get a hold of, and he bites in a playful way but hurts, he's rough, he's chewing my kitchen cupboard corners and i have a special spray which is supposed to give them a funny taste to make them back of but its like he likes it cause it doesn't bother him, ive bought him teething toys but he'd rather bite fingers and other things than his toys, what can i do to stop this as i don't want him ruin my house with out getting rid of him! HELP!