We're pretty sure she had an owner, she just loved the outdoors. We
frequently had to cut the Burrs out of her coat and give her a brushing. We
thought she was going to move in at one point, but she did not get along
with Cali. Her owners started to keep her in more, as she started to look
much better and she showed up less often. They probably wondered who was
brushing their cat. They gave her a furcut one summer and her Ruff never
grew back. She lost her voice at one point and we often wondered if they had
her treated to stop her from howling to get out. She had a fight with an
animal after that and suffered a nasty gash on the side of her face. It was
likely a Coon from the size wound, as she had been known to smack the Coons.
Although she was a BIG kitty with HUGE claws, she was no match for a Coon.
Her owners did a decent job of patching her up though.

We don't know if she finally became an indoor kitty or met an unhappy end.
Hopefully the former.