As a cat lover, trust me, I would have known if there were any litters in the vicinity of my home. The backyard is devoid of any tall vegetation except for some trees, and there were no litters or mama cats there. This kitten was walking by itself down a sidewalk which abuts the backyard, which makes me think some piece of trash stopped their car on the street and set the kitten loose on the sidewalk, poor baby. It cost me $100 to convince the pet store to keep the kitten for a few weeks until it was old enough to adopt out. Also, it had a slight gummy eye, easily treated by a few days of opthalmic antibiotic drops. I didn't have room for a third cat, otherwise I would have kept it. It was just a little white ball of fur with a grey tabby head, tail and saddle. Soooo cute!
Yes, I wasn’t meaning to doubt you—and you clearly have an eye and a heart for helping out the felines.