I spent a portion of my life working at a pharmaceutical research facility. On the back of the building there was a loading dock and 3 exit doors for trash removal. For some unknown reason the middle exit door was a 'trigger' for lost homers. During the 25 + years that I worked there 7 or 8 homers 'homed' to the area of that door. Why ?
Homing instinct of any sort intrigues me. Many years ago I gave a male beagle pup to a friend. Some 5 or 6 years later he was hunting 20 miles to the West of me and lost Red. The next day Red homed to my house. He hadn't been there since he was an 8 week old pup.
In the summer Eastern box turtles will find a vernal pond and dig into the mud to cool themselves. One year a friend and got a big bunch of them and built a pen for them at my house. (Pen sides came down in a storm and they invaded Mr Quick's garden, but that's another story.) My friend carved his initials in the shell of one and drilled a hole in the carapace of another. I did not approve. The next year I found both of the marked turtles back at their home pond - 4 or 5 miles away in the Sourlands. Those who think they are relocating a predator are just fooling themselves. If at all possible all animals will return 'HOME'.