About 1870 she devoted herself to pictures of cats, in which specialty of art she has been most important. In 1876, however, she sent to the Philadelphia Exposition a picture of "Setter Dogs." "A Cart Drawn by Dogs" is in the Museum at Hanover; "Dog and Pigeon," in the Stettin Museum; "Coming from Market" is in a private collection in San Francisco.
Mme. Ronner has invented a method of posing cats that is ingenious and of great advantage. To the uninitiated it would seem that one could only take the portrait of a sleeping cat, so untiring are the little beasts in their gymnastic performances. But Mme. Ronner, having studied them with infinite patience, proceeded to arrange a glass box, in which, on a comfortable cushion, she persuades her cats to assume the positions she desires. This box is enclosed in a wire cage, and from the top of this she hangs some cat attraction, upon which the creature bounds and shows those wonderful antics that the artist has so marvellously reproduced in her painting. Mme. Ronner has two favorite models, "Jem" and "Monmouth." The last name is classical, since the cat of Mother Michel has been made immortal.
Miss Winslow, in "Concerning Cats," says that "Mme. Ronner excels all other cat painters, living or dead. She not only infuses a wonderful degree of life into her little figures, but reproduces the shades of expression, shifting and variable as the sands of the sea, as no other artist of the brush has done. Asleep or awake, her cats look to the ’felinarian’ like cats with whom he or she is familiar. Curiosity, drowsiness, indifference, alertness, love, hate
