I am very aware that he can't defend himself outside. He was never suppose to go out but is quite an accomplished escape artist. Stitch is much, much happier outside now. We live in a semi-rural area and I worry when he is out. None of my cats are out after dark.
I have tried NO with Mo, but when he is in that attack mode I can't do anything with him. I will try the squirt bottle next time. I just don't understand why not just Mo, but the other boys pick on him.