Thanks, good info in those links!
We do have another cat, a 14 year old, 18 pound neutered male. Loki. He's not impressed. It's only been 6 days, but he gets hissy and whines and wants nothing to do with her. For now. I believe he'll warm up to her in time. We've had him since he was 4 months...
My husband picked her up by the side of the road under some cedars on Saturday (9/28/19). Took her home, gave her a bath in Dawn, the fleas just poured off of her. I cried. Visited with the vet on 10/1; she says kitty is 1.7 pounds and probably 4-6 weeks old.
White coat, pale orange-tan...