Okay, AZ peeps, I need some help.
We're building a new (and I hope final) run. There's no separate coop, they'll have open roosts inside the run.
We have a huge rock squirrel infestation. They burrow up into our existing runs and pens and steal feed/eggs/chicks/etc.
The only solution I've come up with is completely encasing the new run in 1/2" hardware cloth on
all six sides to keep out squirrels and other pests and predators.
This requires putting hardware cloth in the ground underneath the run, deep enough that the chickens can't dig down to it for dust bathing, etc. I'm guessing that'll be about 12"-18".
That means digging out a lot of dirt from ground that hasn't been moved or tilled in at least 15 years, probably much longer. It's level ground, no plants/rocks/gravel, no structures, just desert dirt.
This part of the property is surrounded by a concrete block fence with a 23" wide gate. We can't use construction equipment because we can't get anything through that narrow gate.
A tiller is about the only thing we
might be able to get in there and we can't find a rental place that will rent a tiller for dirt that hasn't been tilled in 15+ years. That would only loosen the dirt, we'd still have to move it out somehow.
There might be caliche although I've dug down 2' with a shovel without hitting anything. If there's caliche we're going to just leave it in place and dig around it, we won't be jackhammering or anything like that.
Landscaping companies want thousands of dollars which we don't have. They also balk at not being able to get their equipment inside the fence.
It's looking like we may have to hire people to dig it out by hand (?!). That would create a number of other issues.
Questions:
1. How do you all keep ground squirrels out of your runs?
2. How deep do we need to put the hardware cloth so chickens won't dig down to it?
3. What's the best method of removing all that dirt??

We're two middle-aged women with bad backs and knees, we can't do it ourselves.