Tyson the Fila Brasilero / Tosa Inu mix breed dog at 8 months old—"A lovely natured dog that is great with kids and is extremely alert at all times. This mix was meant to iron out the ferocity of the Fila with the calmness of the Tosa, which worked very well."
The Fila Tosa is not a purebred dog. It is a cross between the Japanese Tosa and the Fila Brasileiro The best way to determine the temperament of a mixed breed is to look up all breeds in the cross and know you can get any combination of any of the characteristics found in either breed. Not all of these designer hybrid dogs being bred are 50% purebred to 50% purebred. It is very common for breeders to breed multi-generation crosses.