Natural Pet Small Animal Papaya Enzyme Plus Tablet SupplementNatural Pet Small Animal Papaya Enzyme Plus Tablet Supplement This supplement contains unique blend of 2 active ingredients Bromelain and Papain. These ingredients are derived from plant origin, where papain is extracted from papaya and bromelain is derived from pineapple. Papain is a natural plant sourced enzyme extracted from the papaya fruit. It is a popular digestive enzyme and able to hydrolyse large protein into smaller peptides and amino acids.