The Fenrir Hammer has survived the Zeus stress test. My son bought it for him at a cost of £15 with £5 postage is indestructible. Website below.
If you have a chewer like me it is awesome and you can put treats in the Hammer too. Available for all sizes.
“The Fenrir Hammer – Fenrir Canine Leaders UK” https://www.fenrircanineleaders.co.uk/products/the-fenrir-hammer?variant=40857940328644
One very happy pup…..