He looks a lot like my Luc. He's a rescue from TX. I did the DNA test and he's mostly Pitbull and Boxer. I adopted him back in May when he was about 3 months. Using those weight charts, he was predicted to be 80-100 lbs but DNA test said 50 lbs. At 9 months he's about 55 lbs. I don't think he'll get much bigger, if he does at all.
As far as training, I kept him on a long line for the first few months. He got lots of exposure but wasn't given full freedom. He's naturally submissive so he listens well (when he's not lost completely in puppy brain). He has a high play drive but thankfully not a high prey drive. He learns quickly but still chases the chickens and ducks if he's in a very excited mood. Though I've noticed it's changed a bit into herding. I think because I taught him to herd my goats into the stall. He also helps herd the ducks into the coop at night. He'll stop chasing if commanded. He isn't let outside on his own when the birds are out but he is off leash now.
Here's Luc as a puppy right after adoption.
And a couple more recent ones. (Trying on his new hoodie for the upcoming winter weather.)
As far as training, I kept him on a long line for the first few months. He got lots of exposure but wasn't given full freedom. He's naturally submissive so he listens well (when he's not lost completely in puppy brain). He has a high play drive but thankfully not a high prey drive. He learns quickly but still chases the chickens and ducks if he's in a very excited mood. Though I've noticed it's changed a bit into herding. I think because I taught him to herd my goats into the stall. He also helps herd the ducks into the coop at night. He'll stop chasing if commanded. He isn't let outside on his own when the birds are out but he is off leash now.
Here's Luc as a puppy right after adoption.
And a couple more recent ones. (Trying on his new hoodie for the upcoming winter weather.)
so I wouldn’t be too too concerned honestly. I doubt he’ll even be anywhere near 100. But he probably will be over 50. Maybe 60-65? He does look like he could be part American Bulldog though which do get bigger than pits but I still don’t think he will be very big.
Cato is much much better. 
