Standard green laser pointers are 5mw or less, just like the red ones. They only appear brighter because our human eyes see green much better than red. To my knowledge, technically, there really is no difference in intensity as far as the potential for retinal damage is concerned between a standard consumer green laser pointer and a standard consumer red laser pointer.
In other words, just because to us it looks brighter, doesn't mean it actually is.
I'm not saying that to disqualify your point though. I understand your point and your concern for the well being of your cats as well as others and it is well founded.