Senor , the Mastino was used for example because of the rapid decline of health in the last 15yrs due to breeding practices....It was done in noway to offend you , Sir, I have nothing but great respect for you..... YOU are the ONLY one to admit outside blood in the Mastino & the EGOS of those who breed Mastini...Thank You ....Tiago has Mastini ...so I dont think he hates them ...The crossing of Great Dane , English Mastiff & Bullmastiff into Mastini lines , I have no problems with ....Just let those potential owners KNOW what is in there ....here are some stats ; Great Dane 11.8 % ....English Mastiff 19.3%....Bullmastiff 24.5% HD .....Now on to Dogos... In my humble opinion ACCEPTABLE outcrosses are APBT , Bull terrier(colored) & Great Dane.....This would be done to improve...Hips , Hearing & Skin issues ...But this is the opinion of a Redneck backyard breeder.....