If you're worried about predators digging under the PVC tractor, you might try this around the bottom:
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It has worked great for me. I live right next to a huge woods w/ coyotes, foxes, ect, and have never lost any birds to them. I would have to think it would be tough for any animal to figure out how to dig under.
Just a suggestion. It's great piece of mind for $30 worth of hardwire.

It has worked great for me. I live right next to a huge woods w/ coyotes, foxes, ect, and have never lost any birds to them. I would have to think it would be tough for any animal to figure out how to dig under.
Just a suggestion. It's great piece of mind for $30 worth of hardwire.