Dogs have always been known as a remarkably loyal species. The story of Hachiko, an Akita dog who kept on waiting for his owner in the same place even after his owner's demise, is just one of the heartwarming tales that could prove it otherwise.

Another story mirrors the same loyalty. Meet Rubio, the Argentinean stray dog who developed an attachment with Olivia Sievers, a flight attendant from Germany.

According to Nine News Australia, Sievers first met the dog in February during her lay over in Buenos Aires.

When she saw the dog while she was having a walk, she played with him and even gave him some food. On her way home, she noticed the dog is still following her.

"I tried to change my way because I didn't want that he follow me back to the hotel," she told Noticiero Trece, a local news site.

"But it was not possible. He always came back and followed me. I tried one hour, but he always watched me and followed me. He was really happy that somebody gave him attention."

Rubio started to sleep outside the hotel where Sievers is staying. To make the dog comfortable, Sievers provided Rubio with a blanket.

Eventually, Sievers had to leave Buenos Aires. But their story did not end there. Every time Sievers comes back to Buenos Aires, she always finds the dog patiently waiting for her outside the hotel where she regularly stays at layovers.

Bored Panda notes Sievers tried to find Rubio a permanent home, but Rubio kept on coming back outside her hotel.

Eventually, Sievers decided to adopt the dog. According to The Dodo, Sievers applied to transport him from Argentina to Germany and he is now enjoying her new life with the other dogs of Sievers.

Recent study showed that fertility of male dogs are being impacted by environmental chemicals. This might be the right time to find that perfect companion and to take care of them more before it is too late.