Excuse Me for Being a Dog!

Excuse Me for Being a Dog! (Japanese title Inu de warui ka!!) is a manga by Rumiko Takahashi mostly about a 'human' family where the men transform into dogs if they get a nosebleed.

The story was originally published in Shonen Sunday 1985 volume 47 and reprinted in Manga Vizion volume 3 #2 in 1997.

Characters

 * Shiro Inugoya, apparently the only child of the Inugoya family. He is a giving/helpful person. He transforms into a small white dog.
 * Mr Inugoya, father of Shiro. Slightly gruff. He transforms into a small (gray-haired?) dog with a white mustache (also has mustache in human form).