Yumz massages and gives treats! This new treat dispensing chew toy has GMT – Gum Massaging Technology. Made from TPR, the inside treat cavity has 3 fins to hold treats longer. It bounces and fetches as well! Choose from our 5 Rogzilicious colours in one of 3 sizes. Yumz massages and gives treats! This new treat dispensing chew toy has GMT – Gum Massaging Technology. Made from TPR, the inside treat cavity has 3 fins to hold treats longer. It bounces and fetches as well! Choose from our 5 Rogzilicious colours in one of 3 sizes.