This pig, from a farm in Greece, clearly already had her hands full with her own high-energy brood -- but she thought nothing of doubling her workload to nurse and take care of these adorable drowsy puppies.
4. This mama cat and her mismatched pair of triplets
That's right: this new mother found three feathered "children" in need and added them to her little family soon after giving birth to a mewling trio of kittens. The ducklings even latched on, even though normally they would get all their water and food from their environment, because duck mothers don't produce milk. After a few weeks, the ducklings were already much larger than their kitten sibs, but they still follow their adopted mother around diligently.