WELLYTAILS DIGESTION AND IMMUNITY RX DOG SUPPLEMENTA very common problem for a large number of dogs is difficulty in digesting their kibble or RAW food. This is especially the case for kibbles formulated with grains and high temperature processes. Grain free kibble made from multiple times cooked meat powders and meat meals along with various pulses (peas, chickpeas, lentils) can be rather difficult for some dogs to digest, especially as dogs get older