A mom giraffe is pretty nice until the fetus drops.
She'll birth a newborn baby calf, then kick him 'til he walks.

Whenever you feel guilty that you haven't cleaned the house:
Sexton beetles raise their kids in a decomposing mouse.

A koala mom will feed her kids her own poop. Yes, poop. Panda moms will abandon one twin because raising two is, well, just too much. And every now and then a cuddly little hamster mom will --yup-- eat her newborn pups.
These and other true facts from the animal kingdom offer a hilarious reality check on what constitutes "good parenting." So, human mother, time to stop worrying about the job you're doing --because you're a great mom.