If you're talking about breed, try looking at their fur type and color and size. ear types help, too. if you're talking about gender, you look...
No
no
no
yes you can (=
yes they can be used
Nose prints can be used to identify dogs as they are similar to our fingers prints no two are alike. This can be one of many different methods to prove the identity of your dog should it become lost or stolen. Other forms of identification are microchips, tattoos, and id tags on collars.
no
maybe yes no
They usually have a blind person holding onto them
Dogs identify humans by their scent so you can't really say that it's offensive to them.
You cannot use just weight to identify a material.You can use density to identify materials.
Finger prints no, nose prints yes.