Except you have 2 variables - puppy/no puppy; and copy A/copy B, and therefore 4 combinations. You only tested two combinations, so you have no way of knowing

Except you have 2 variables - puppy/no puppy; and copy A/copy B, and therefore 4 combinations. You only tested two combinations, so you have no way of knowing if the puppy or the alternate copy was the reason for the increase.