Sadly, Thanos went through four different families who all rejected him because they could not deal with his cancer.

This dog, now named Thanos, was diagnosed with cancer, which rapidly spread to his head and caused a massive tumor.

luciianokarosas/Instagram

Eventually, he ended up with 21-year-old Luciano Karosas, of Berazategui, Argentina, who adopted and welcomed the pup with open arms.

He wanted to care for him and show him unconditional love during his final days on Earth.

luciianokarosas/Instagram

The hardest part of adopting him was getting used to the idea of how little time they’d have together, but Karosas knew it would be worth it.

Karosas brought Thanos to the vet, hoping for good news, but the vet explained that there was no treatment that can extend his time.

