[logicalmonster]

1) How is cats killing animals such as birds and mice actually a problem? Do we have a shortage of birds or mice? For the most part, even if they're domesticated, I'd consider cats eating things as part of the natural food chain in the way that nature designed.

2) Suppose you could solve this "problem" and you could design a device that emits some sound and makes cats' hunting fail. Have you considered the far reaching environmental consequences of this? What are the second order effects on the insect populations and human crops?

[adrienchauvet]

Yes, wild birds and rodents are massively disappearing. The problem is there are too many domesticated cats hunting in the wild, to the point of exterminating wildlife. Insects are massively disappearing too. Not because of too many birds, because of too many pollutants in their environment. Scientists noticed the cat problem and I'm trying to find a solution on this website.

[is_true]

A cat is a startup with VC money competing with a bootstrapped business.