17th century Dutch tavern scene.

An extremely filthy, torn, scuffed oil on canvas from the mid-17th century. Tavern scene featuring peasants carousing..

A little dog appeared behind the chair-well parts of him. Gradually worked out how his legs were positioned ... and there he is back in place, warming his backside by the fire.

Trying to determine the artist, or who this painting is after, and I thought at first Teniers, but after rummaging, my guess is Ostade - there are similar motifs in some engravings, such as the character losing his hat as he extends his arms, and the arch with latticed window.