There are women who would like to have babies but are unable to because of whatever issues they may be having. Then there are women who do not respect their fitness and ability to bear children and treat them like garbage. Mother who bore this little girl felt no connection with the child and threw her away (literally) right after birth.
When the body was discovered, it was already dead and bore signs of dog bites. It is possible that, unaware of what they were doing, the dog(s) just wanted to play. It is also possible (based on opinions of the villagers), that the bites were sustained post mortem. That means that the girl was already dead when dogs got to her. Sad end to a life that had just started.
Location is unknown but it’s an obvious South East Asia. It could be the Philippines, Thailand or Indonesia, though my guess would go to the Philippines cause they are experts on ditching foetuses in the dirt.