When he awoke the next morning, he was even more tired than the day before. He wasn't eating or drinking, and he started pacing around in circles. He passed away soon after.

Even though Guido didn't know Watson for very long, the impact he made on her that night is something she'll never forget.

And after a life of certain neglect, it surely meant a lot to him, too.

"I'm just so thankful I was able to hold him tight for his last night," Guido said. "I was telling him how much he was loved — and that his life mattered. My heart is breaking, but I would not change a thing."