I wasn't sure whether to post would be best suited in diet or housing... but here goes!

I'm looking for suggestions for a hay feeder for Twix. Since he's gone completely free range (no cage), I've been trialing lots of different hay feeders to find what is going to work best. My main concern is trying to keep up with his litter training and so I'm aware of keeping the hay as close to his litter tray as possible (or even one in the same) to promote use of the litter tray.

However, I'm still not quite there with what work's best.

At first I had one of these, and placed it next to the litter tray (https://www.amazon.co.uk/gp/product/...?ie=UTF8&psc=1) in the hope that he would eat it from the litter tray, but he would just sit next to it and pull it all out on to the floor and make such a mess

I've also tried just an old box file with the lid cut off (https://www.amazon.co.uk/BLACK-BOX-F.../dp/8629000422) because he did like to sit in the hay whilst eating it, but then he would start pooping and peeing in the box and not only would it destroy the box, I was worried it was interfering with his litter training.

So next I think I want to try something like this as it would solve the litter training issue (https://www.etsy.com/uk/listing/5307...CABEgIncPD_BwE) but can't find any alternatives to this one which seems to be crazily expensive!!

Would really appreciate any suggestions of what works for you