It is about a little boy he was crying and wondering what he did wrong for his mom to hate him or something like that and god reincarnated him and he was reincarnated even younger then before but before he was sent to the other world he asked him what his favorite animal was and he said doggy so he was sent into a forest along with a Fenrir and knights or something came upon him and they took him in and later adopted by one of the knights.

Just to let anyone know I found it the title is called Yasashii kazoku to, takusan no mofumofu ni kakomarete.