My dog Ginger was born feral in the deep East Texas woods and spent the first 7-8 months roaming with one of her litter mates, Prancer. We left them a big turkey pan full of dogfood on Sundays and they always showed up when we returned on Fridays. We drugged their food once to get them spayed and wormed. (You can't touch or handle feral animals.)
One Friday evening we arrived and the dogs didn't show up. Late that night Ginger showed up alone, spattered in blood and terrified. She was strangely lethargic and we actually thought she was dying. Awhile later she wandered out in the woods and I said "enough of this" and tracked her down after about an hour and grabbed her. Suprisingly, she didn't try to bite me.
Now she is reunited with her remaining brother, sister and mother, who we had taken in before they had turned totally feral, back when they were puppies.
I have a cat - Pretty Girl - I trapped who was born feral, too. It is amazing what happens when they finally "turn". Neither of these animals will give me any peace, they follow me everywhere and demand constant affection. Not sure which is worse!
Wish we could have saved Prancer. It is likely someone shot her - Ginger had no wounds on her that night. Country people consider feral dogs the same as coyotes or hogs, as a threat to the livestock.
If you ever consider "whispering" a wild dog or cat, send me a note. I can share lots of things I learned that will help and let you know what to expect. It's a long process but it is worth it.
My pets may not be "royalty" but you could never convince them of that. They're both total divas!