I have a new kitten (Slalom) I rescued from my work (warehouse).
We have an earlier rescue cat (Sochi) from work also. The method we used to socialize Sochi was to keep her in our room for a day while introducing her to our other cat and dogs. We then put her inside a large crate in the living room for a couple days to socialize with others while separated from them so she would feel safe. At first Sochi hissed, but she now roams around the house and is affectionate and sociable.
But our new rescue kitten (Slalom) got out of the crate and hides in the basement. He's leaves the basement when no people are around. Our other cats go to the basement with him. He has all needed essentials, treats and toys. I can approach him to give him treats now, but he won't allow me to touch him. He has never hissed. But he has been hiding in the basement for 2 months now. What can I do to get Slalom to trust me and other humans and become more socialized?