Responses
If I remember correctly there are 3 related series by the same author. I think I have them on both lists. You can choose the ones that seem interesting to you.
Animal ears
http://www.mangago.zone/home/mangalist/155720/
Animal characteristics
http://www.mangago.zone/home/mangalist/170119/
Do you guys know more mangas similar to this?? Please recommend it to me :3