Do scientists know how far most animals can see and how do they find this out?

T

Terminator

New member
Ok we humans can for the most part see for Infinity right? We can see the stars that are Billions of light years away. But do we know how far animals can see; like cats, dogs, birds, Elephants, and so on? Can animals see the stars also and do they know what these dots of light are? And if so how do scientists figure this out? Do they put select items out to certain inch, foot, yard, mile and see if the select animal can see it? Or is there another way of figuring this out?
 
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