I go to catchow.com and read mentor questions - people's questions answered by vets. They said that all cats can make 'eye boogers' like we can and that orange cats tend to at least seem as if they are making more because their eye boogers are dark brown. I have noticed with my orange girl, she seems to make eye boogers all the time! I'm forever cleaning her eyes but she's very healthy; it's a natural thing in cats like it is in humans.