A good foundation contractor will have a clause for the depth of the hydraulic piling, beyond which there’s often an extra cost. If the contractor does not have this clause, he’s more likely to prematurely cease at the required depth for your particular job so he does not incur a loss.
Whilst the concept of sticking a few goats or sheep in your yard may be an interesting resolution for retaining your garden in check, we doubt that you’re rapt with the idea of having to scrub up after them. This leaves you with the only other resolution of purchasing …