The bedroom is where people live and sleep. It is entirely up to them to decide what to hang, as long as they like it. If the color matches the bedroom, the dog photo is cute, or the dog pendant can be hung there if you like. There are no special restrictions. If you feel that the bedroom wall is not particularly flat, hanging dogs will add a lot of color. There are no taboos, and it is generally better to hang some warm pictures in the bedroom.