Heh, those only LOOK like beautifully manicured flower beds because it is spring.

I'll have to get another pic from ground level. All plants along that wall are old, tough shrubs or 10"+ diameter fruit trees trimmed fairly high with just dirt and weeds underneath. When I had chickens, I left a lot of leaf litter, wood chips, dropped fruit, and interesting logs under there for them and would do so again. The bantam cochins didn't dig it up too much (as far as chickens go), just a few dust baths.
I am beach-city urban. 1/4 acre lots with 6' privacy fences are the norm. The 12' x 3' predator proof, open air coop/run combo is in the shade house for nighttime predator protection. I was just wanting an unsupervised daytime foraging area instead of only giving them the whole yard for a few hours per day.
The hawks are my only worry during the day. I know where their nest is, about 1/2 mile away. There are scores of pigeons around and I've seen the hawks drop out of the sky onto the pigeon flocks. I was thinking the bantams under cover would be so much less obvious a target, but yes, it is riskier than what I was doing with my past hens.
Shad's philosophy seems to be to let chickens be chickens and forage, and learn to be predator savvy.