I dont think the pennies in a can is a good idea, i recently used it to stop Duchess from barking when playing with her toys, obviously she is going to bark a bit through excitement but she goes non stop! i started using the can, all it did was scare her so much she wouldn't play with her toys, in fear of the can coming out! i think she thinks that she isn't allowed to play with the toys, when actual fact its the barking i want her to stop. But i deffinatley wouldnt advise using that technique on a young puppy |