Koo is a 15 year old cat with a big loving heart. Ever since his human was pregnant with a little baby girl, he's been by her side every step of the way.

This adorable Japanese Bobtail started hugging his baby sister when she was still in her mommy's womb. He purred to the baby throughout the entire 9 months and was there hugging the belly when the baby kicked and moved.

Then one day, his humans came home with a much tinier human. He walked up to the little baby who was fast asleep. After a few sniffs, Koo was in love.

Like Toco the cat, the bond was instant for Koo and his baby sister. He started guarding her by her side ever since.

Koo curled up for a nap while the baby was bundled up like a purrito.

He teaches the baby how to roll...

...and guards her when she naps.

The baby loves being tucked in together with her 15-year-old feline brother.

Wherever the baby is, Koo is always nearby, keeping a watchful eye.

He likes to snuggle up to her and hold her hand.

This beautiful senior cat makes the purrfect companion for his baby sister.

Older cats make wonderful companions. More @rippy0916