Same thing happened to me. I was born with very dark hair, which turned blonde, which slowly darkened to brown. Still isn’t as dark as it was in my newborn pictures.
We had a feral, Barney, living in our yard who we were feeding. He knew we were to Food Providers and had the Bring Food NOW stare down cold, but we couldn’t get too close. We trapped him to get him fixed and at least one round of shots. He was Very Annoyed for a few days after we got him home, and glared at us from the safety of the garage when we put his food out. Then he apparently decided that as long as we continued feeding him and didn’t make a habit of grabbing him and carting him off to the vet we could be forgiven.
His girlfriend Tabby was friendlier and would talk to us and let us get close. We were able to cart her to to the vet several times over the years she was outside, partly because of the three outdoor cats hanging around she was the one we could catch and if one had the sniffles, the others probably did, too. She forgave at about the same speed as our inside cats dd, and over the years she started accepting pets and discovered the joys of parking on laps when someone sat on the porch to pay attention to her. Tabby was eventually convinced to move inside for her health. She declined the invitation for while, but when we forced the issue demanded to know why we hadn’t told her it was so darn nice inside before.
Same thing happened to me. I was born with very dark hair, which turned blonde, which slowly darkened to brown. Still isn’t as dark as it was in my newborn pictures.