This is a chromolithograph titled "The Pet's Toilet". It is signed in the plate at the lower right by the German artist, Carl Johann Arnold (1829-1919). He did many artworks that included dogs. This one shows a young girl dressing her dog, possibly a Newfoundland. She is tying a hat on the dog, maybe her own hat judging from her outfit.
It is in a lemon gold wood frame. It has old glass, a two piece wood backing, with a wire for hanging.