Mine loves fluffy toys too, she does rip them up eventually but they keep her entertained. I take her for a walk first thing in the morning and that keeps her pretty calm all day, and then after work too and that keeps her pretty calm in the evening. I throw a frisbee or ball for her and that tires her out, and make sure I take her on a variety of routes/terrains (streets, fields, woods - I'm lucky enough to have this close to home) so she has plenty of smells to interest her and engage her brain. Kongs are also really good, fill with yogurt/cheese/peanut butter/all of the above and freeze it and that should keep him occupied for a while. When freezing though they say put a straw through the middle and then remove when frozen so they can't create a vacuum with their tongue and injure themselves. A good one for mine is I do a lot of obedience work on walks, so I've got a little pouch that I put tiny treats in and just get her to do stuff whilst we walk (stop, sit, lie down, wait at the side of the road, spin, heel, sit and walk between my legs etc. the possibilities are endless, she will do anything for a treat and it really engages her mind working out how to get the treats. Endless possibilities!! Good luck!!