I'm trying to replace two dead bushes. There was one single bush (My guess is either a boxwood or juniper bush) on each side of the porch stair case. I was hoping to find something non toxic for kids, dogs, and especially cats. Most likely the cat will frequent these bushes. Everything seems to be at least somewhat poisonous from what I read on the internet.

I would appreciate suggestions. I would prefer something that grows around 4ft tall and thrives in the USDA zone 6.