Cat Companions Maruru and Hachi Vol 1

From the Seven Seas Entertainment edition

An odd couple of stray cats team up to share the trials and tribulations of life in this heartwarming manga. Maruru lived a pampered life till one day, he ran after a flock of sparrows and couldn’t find his way back home. He encounters Hachi, a tough stray, who says he doesn’t need a spoiled house cat on his territory and chases him away. But then Maruru helps Hachi out of a jam, and they team up to face life on the street together.

Source: Penguin Random House API