> On 14 Feb 2018, at 15:23, Karlin High <karlinh...@gmail.com> wrote:
> On 2/14/2018 4:34 AM, David Kastrup wrote:
>> The mice were running around openly and rather visibly before that.
>> Already when the cats were confined to one stable cell, the difference
>> was staggering. When they roamed freely, it was overwhelming. They
>> couldn't have caught hundreds of mice in that time frame: it's just that
>> the visibility of the rodents dropped by wagonloads.
> Cats are a natural rodent deterrent, even if they're not actively hunting.
> Mice can smell urinary proteins secreted by cats, snakes and other predators.
> According to a 2010 study at the Scripps Research Institute, mice don't
> recognize predators because of experiences with them but because they have
> evolved to do so. The mere scent of the urinary proteins found in cats
> triggers a fear response in mice.
> "It's not like they're even going after the rodents," Sathe says of the cats.
> "They're kind of like a sonic force."
> <end quote>
They don't hunt much if properly fed, just some for sport.
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