Dogs in Art: Which breed appears in this Renoir painting?

Originally bred as working dogs:

Though not classified as a terrier, this dog was originally bred to work like one. His job was to exterminate rats and other pests in German stables of the 1600s.

Personality:
 Standing less than a foot tall, these sturdy terrier-like dogs approach life with great confidence. “This isn’t a breed you train,” a professional dog handler tells us, “He’s like a human. You befriend him.”

They can be willful and domineering, but are mostly loyal, affectionate, and always entertaining.

Appearance:

The dense, harsh coat is described as “neat but shaggy” and comes in several colors; the gait is light and confident.

Influence on two later European breeds:

This dog is thought to have been an influence on the development of such later European breeds such as the Brussels Griffon and the Miniature Schnauzer.

Name of the breed:

Affenpinscher. (The name Affenpinscher is German for “monkey dog” or “ape terrier.”) Eventually, Affenpinschers were brought indoors to rid the kitchen of mice. In time, they became dual-purpose dogs: ratters by day, and by night devoted bed-warming companions for the lady of the house.

Answer: The Affenpinscher is depicted in Auguste Renoir's Impressionist oil painting called "Luncheon of the Boating Party."

Image: https://artsandculture.google.com/asset/luncheon-of-the-boating-party

Text Source: https://www.akc.org/dog-breeds/affenpinscher/

"Dogs in Art" created by Marina Veronica of Sweet Walks Beverly Hills (SweetWalksVIP.com)