Here's my one and only comment on this.
The domestic cat is an introduced invasive species and has never been
part of the Western hemisphere ecosystem. If you choose to
dismiss the impact on native birds, you might consider this:
I regret that I don't have the temperament to engage in a dialogue on
this topic as I'm rigid in my opinion that cats belong indoors
for the welfare of our wildlife and of the pet cat.
S. Hadley, MA