She doesn't really bother Charlie much anymore, not sure if she understands that he's not as playful or active as she is. Izzy on the other hand will pester Charlie and sometimes knock him down, he is a fair bit bigger and heavier, we try to keep him from being too rough. With Olive, Izzy can be rough at times too, but she absolutely will not tolerate it and puts him in his place. He kept trying to steal the sticks from her today after she had swum out to retrieve them but she would snap and growl at him. She's dad's girl!
