Hi I am very familiar with this topic. In Janurary I rescued a 2 year old chinchilla. She had little to no human interaction,a 1 story hamster cage that was literally being held together by zip ties. She had poor quality food, not enough hay, no toys, and no way of exercise. When I brought her home she was a little stressed out, especially since our dog discovered her. I got her a 4 story cage, a wheel, huts, toys, quality food, and much social interaction. She let me pet her and was a little uncomfortable with that but warmed up to it. She doesn't like to be handled and I respect that. As of last month our bonding got much better. She jumps on my shoulder for transportation, she know tricks, when I walk into the room, she immediately gets out to say hi. No longer feels the need to hide in her huts and sleeps in plain site. She and our Husky/Malamute even get along to the point he sleeps in the same room and I feed her while he is there. It took a lot to get to this point however. It takes time and be patient. As long as she gets time out the cage, quality food, fresh water, and a lot of socialization and love he will be happy and healthy. It was easier for me to bond with her cuz despite she being neglected, she has a very social and outgoing personality and craves attention. Yours may not be like that and may take some time, but be patient. One thing you can do is play music for him or set up a tv. Many chinchillas love tv and music. Mine actually dosn't like music on the radio but if I pull out ANY of my guitar ( eletric, acoustic, or bass) she comes out and watches.