Thought this might be useful for you if you haven't found them already :
Stagbars
Chewing releases, feel-good chemicals from the brain and keeps dogs happy, busy and using up energy. Made from 100% natural antlers, Stagbars are safe, won’t splinter or chip or cause blockages and they don’t contain nylon like some long lasting chews. They are not an ‘empty’ chew like rawhide and in fact, contain important minerals.
They clean the dog’s teeth, rather than bung them up like some dog chews and they’re great for dogs with sensitive tummies. Even dogs who are losing weight can enjoy Stagbars because they only contain a tiny amount of fat. Naturally, they don’t contain additives or preservatives.
Stagbars are clean dog chews, leaving no stain or mess on the carpet and they are also very low in odour.
They're form our pet shop but i'm sure others do them
j x