I'm wondering how much the environment they're able to explore affects their attraction to our gardens. Mine for example, don't care much for my gardens. My property is surrounded by an extensive wooded area filled with deep leaf litter, My lawn is also somewhat wild, with a lot of clover and other "weeds". I find that my birds have a preference for clover and scratching around in leaf litter. Perhaps having these options account for the reason they leave my veggies and other plants alone. That said, I've only had my chicks and keets a little over two months, so there may be a dramatic change in behavior.