Thank you both for your feedback and reassurance
Great idea re the middle area. I have an idea in mind now around that.
I had never heard of either of those but will see what's available here. So far I take his fav bits from the food mix and stick them in the puzzles so he has to work for them and have some crunch sticks he likes but I don't give him them much and only a half as they seem to have a lot of filler. I will put an in shell walnut in tonight to attract him to that burrow area