you can fill the hollow part with something soft like VAISTO meatballs

Suitability – Works with all dispensers

100% pure salmon fillet rich in Omega-3 fatty acids

Safe to use with topical flea and tick treatments

ardent orange Size:Large ( 234G/ 8 oz. ) you can fill the hollowGet bright and fashionable color lasting 20+ washes with OPAWZ Permanent Dog Hair Dyes. Specially formulated for use on dogs and horses. Non toxic and gentle on the pet's coat. For professional creative groomer use. Charm Pink, Glorious Yellow, and Tender Green ONLY work for white and clean hair Can be used on white, grey, apricot, and brown coats Coloring results may vary with coat type and breed Permanent Dyes can be mixed with each other according