Giovanni Cassata, veterinary surgeon, 53 years old graduated in Veterinary Medicine in 1991 with full marks, after a period of internship at a clinic in Civitavecchia, he began his freelance activity aimed mainly at the clinic and surgery of small animals; in a seven-year period he performed over 4000 general surgery on dogs and cats as the first operator. Since 2000, head of the “A.Mirri” Experimental Zooprophylactic Institute of Sicily, today Ce, Me.Ri.T., Where he mainly deals with minimally invasive surgery, on animal model, in collaboration with the main regional surgery units and national.