The first two cards look like Bonzo, a famous cartoon dog, from which the Bonzo Dog Doo Dah Band took their name. However, wiki tells me that Bonzo was first created in 1922 by George Studdy, and yours reads 1910 by A. Blue at the bottom.
But the resemblance is very close!
This image is a card glued to the cover of the Bonzo Band's 1972 album 'Let's make up and be friendly'