Would tom cats spraying do that kind of damage?
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I have 3 cats of my own, two of them neutered males, one female. They have
left bare patches on the lawn where they've peed and dug but there is no
smell. On top of that, there are a few other cats that come roaming in, two
are definitely male and spray. I don't know if they are neutered or not.
However, cats always spray to leave their scent against something upright,
not the lawn - that's just used for toileting purposes! The visitors here
spray against the herbaceous plants, the tips of the leaves are slightly
brown where they've sprayed but no strong smell.