When our 12 week old puppy gets excited, he does play bite. Each time his teeth touch our skin, we say "NO" Firmly and put him in his crate for about 30 seconds. This doesn't calm him down everytime. We have also tried the water spray which helps when he's doing something like biting slippers or trouser legs. I just would like some advice on whether these methods are likely to succeed?

Also, he has travel problems. He is fine in a stationary car with treats and a toy to help him stay calm. We have been putting him in the car with us, with no engine on, for a couple of days. Tonight we turned on the engine and he started to bite and get very agitated. Are we going to have to take these baby steps for a long time to come?

If anyone has ever experienced the above things, please tell me how you managed the situations.

Thanks.