my puppy is very aggressive with my 10 yr old

[Summertime Mommy]

I have a bullypit who is approx 6 months old. He has always played a little rougher than we would like, but for the most part e have always been able to calm him down but now he is getting really aggressive with my 10 yr old. He will just jump on him out of nowhere and bite him, today I had to physically remove him because saying "no" or "down" wouldn't work, and he started growling at me and tried to bite me. Obviously this has to stop right now. We can't really afford to have a trainer come out now, but we might have to if we cn't figure out how to solve this problem very soon. I think one issue might be that he needs more exercise, so I am going to start taking him on twice daily runs on top of our walks, but what else can I do? I really need any advice I can get. Thanks!

[Oubliette8]

honestly, I'd get the trainer asap. Advice over the internet, from people who haven't seen the dog or its behavior in person, and who may or may not know anything about dog training is really dangerous in a situation like this. The wrong advice can actually make the situation worse. A 6 month old dog is big enough to cause damage, and a child is involved. If its true aggression it needs to be dealt with by a trainer right away. I can think of any number of things that might be going on, but I'm not going to speculate. The absolute best thing to do is consult a trainer now, this isn't a situation that should wait to be adressed or that you can really try to fix on your own.

[my2girlz]

If my pup did that I would have them on a leash attached to me so that you could monitor the behavior and stop it. We have a 1.5 year old pit/boxer and she's as gentle as can be with kids (and adults) so I don't think it's a breed issue you have going on.

ETA: More than likely he's seeing the kids as one of his littermates so he plays with them like he would with one of them.