Look at that scar on his head. Something tells me this isn't the first time his parents have treated him like a dog.
In my time in Mexico I was consciously looking for somebody that didn't have a gouge in their head. Besides the people who had long hair or a hat, you can always spot a small hairless knothole, up top. My dad, born in Guanajuato, has four from before he can remember.
Besides that, the parents just let their kids run free in the streets. Driving down the villages, you have to cuss the kids to get off your truck.
Third-world-nation parents just don't have enough in life to care about their kids. It's so much easier to just cast them off and hope they'll feed your ass when you're bed-ridden.