Abstract: This invention comprises applying phytoceutical compositions to pets, which given their sedentary life and nutrition, are susceptible to a higher prevalence of cancer and degenerative diseases. The compounds contained in said compositions frequently have anti-oxidizing properties acting to inhibit harmful reactions of free radicals; free radicals are often a cause of cancer. Said compositions comprise extracts or concentrates obtained from the enzymatic or alkaline hydrolysis of several plant sources, containing effective concentrations of two or more phenolic compounds, such as ferulic acid, coumaric acid, caffeic acid, protocathecoic acid, and vanillic acid.