"It may be the Bowes’ dog ‘Palette’ (from the shape of the ears), which they had to leave behind in Paris during the Franco-Prussian War of 1870-71."

Source: https://www.thenorthernecho.co.uk/news/23700717.bowes-museum-barnard-castle-celebrates-national-dog-day/?ref=rss

The French capital is emerging from the trauma of the siege of Paris that marked defeat in the Franco-Prussian war, the subsequent collapse of the Second Empire and the bloodshed of the Paris Commune insurrection.

Source: https://www.theguardian.com/artanddesign/2023/dec/31/paris-impressionism-musee-dorsay-1874-exhibition-avant-garde-art