Cow hooves are the toenail of the cow - one of the toughest natural treats.  Hooves are made of keratin (a fibrous structural protein).  For something different, these can be filled with a fruit slurry, minced meat, goat kefir etc. and served frozen.  Great to help keep your pooch cool in summer and the filling provides an extra diversion resulting in an even longer lasting treat.  They can also be refilled/reused once the filling has been eaten.  A boneless, low fat treat suitable for all dogs of all ages.  Great for teeth cleaning and a great inside or outside treat – not too messy.