That's an Italian hand gesture symbol. It means stretching out your arms with joy as you say it. The hearts are the tone as we can only say their name with love.

It varies from jurisdiction to jurisdiction, but it's one of the ways that a spayed/neutered animal is indicated. My dog has a line tattoo next to his crotch instead, but especially with outdoor cats an ear missing the tip is a sign to animal control that they don't need to trap it again. (っ◔◡◔)っ ♥ babypossum ♥ seems young enough, maybe 1-5 years old, that I think they might be a stray that hasn't been captured yet. I haven't checked their belly yet for the tattoo that normally goes on pets being fixed by their owners/shelters.