As a dog owner, the man or woman that did this should be charged with murder, because it is murder, but they don't consider it murder because the dog is not human.
No, because that would mean killing animals for meat would be murder as well. If you're suggesting that simply because the manner of death was cruel does that mean you'd be okay if the animal had been killed in a humane way?
As with most things, humans are very hypocritical in their values.
Last time I checked a baby in the womb is still a baby and thus a life.
Personhood begins at birth when a baby's life becomes independent to that of the mother. The arbitrary restrictions on abortion are a religious anachronism and termination should be allowed at any point until birth.