neos and mastiffs are part of the mix for sure,just look at the dogs,how does a pure bred apbt or staff give birth to dogs that have the same features of other breeds like neos,thick hanging flues and dewlaps,rear ends that are higher than the height at the shoulders,and massive dogs,drooling dogs?
Ever hear of iron cross kennels?o.g gray line blood[lol],dogs directly off gotti,dogs that are 140 pounds plus,and as tall as there owner standing on there hind quarters,they say they wont stop intill they get 150 pd dogs,and guess what,no pure bred amstaff or apbt ever gets that big,ever,not from line breeding,not from inbreeding only from paper hanging and outcrossing,it happens all the time,you dont believe it then fine,choose to live in the dark its your desision....also,then amstaff was registered by the akc in 1936 i believe,70 years down the line and breeding just for show and head size has created a diffrent breed,they are not apbts no matter how many times there duel registered,also the bulldog used to create the apbt is not the english bulldog of nowadays used to enrich "re"and gotti lines and most the blue low rider stuff.basically the modern bulldog is a cripple with a lot of heart,it wants to be athletic and energetic but has been bred to such a state it just cant,its actually a pug cross from the late 1800's,sounds strange but its true....