I'm trying to recap and think in my head but maybe I need to think out loud on here.
So...
At minimum we could have a lack of supervision here and to the other end of that, a dad messed up on meth, busy making meth or explosives, etc.
The dog was found with the boy. The dog was alive, the boy was not. It appears what the brother said may be true.
2 miles away. Not unheard of and just 2 hours before that the sheriff was saying cases where a dog is with kids sometimes go a whole lot farther too, but we all know they can with or without dogs, but makes sense...
Dad has explosives and meth and/or chemicals and all are bad signs with kids in home and he has been charged with things relating to both... Mom claimed domestic abuse, strangulation attempt I think and said she was worried she or the boys would end up dead at his hands one day. That's pretty striking right now... Mom left dad. Was it about a year ago I think I read somewhere above? Dad only gets 5 days a year with the boys for some reason, even though different states, one would think he'd get them more in the summer too, etc. An educated guess would say there is a reason for that...
I guess if mom left this property and home, the boys at least before mom moved them may have known the property and the dog may have been a family dog even if they hadn't maybe seen the propery or dog in a year but they are pretty young. This one would have been 3 since now it is said he was 4 though.
Anything else? I mean there's ample reason here to wonder if there was any foul play here, or lack of supervision, or simply an accident and more even.
It's been said more than once the boys were adventurous and were boys and I take that to mean, they played, wandered maybe, had freedom.
IF the older boy was supposed to keep track of his younger brother, I disagree that should be the child's job although if it was, he did report to his dad the child went under the fence. Did he lift the fence to let the dog under too or was there just that much room?
I know we will have to wait for more info just trying to think of the possibilities here.
I mean there are some out there possibilities like snake bite, tons of bug bites, reaction, etc., he did step on an explosive but the dog was further along or didn't get as injured or at all, and all sorts of things but I'd say they are more unlikely.
I guess there is also the possibility he died days before BUT the dog WAS with him two miles away...