From The Public Domain Movie Database: Sick zoo and farm animals come to Betty Boop's animal hospital seeking care from Nurse Betty.

cartoon

You can find more information regarding this film on its IMDb page.

cartoon 1936

Yoiu can find this film elsewhere in the archive. I have added a generic music track fir easier viewing.

From Mel-o-toons, I give you The Trojan Horse, circa 1960. Enjoy

From The Public Domain Movie Database: A young boy is learning to shoot a gun at the same time that a robin is trying to teach her babies to fly. Being a typical boy, he proceeds to shoot one of the baby birds. The robins hold a funeral which saddens the boy enough to make him break his gun. Rain starts to fall and wakens the baby bird who is not dead after all.

Any little girl that's a nice little girl (1930). A cat in a tophat is looking for a girlfriend this cartoon Star's Kitty lulu Belle/bell who isnt Betty Boop. Betty Boop can be seen in the backround & various pictures in this Cartoon (for example the girl with the bows in her hair).

Mel-O-Toons sometimes erroneously called "Mello Toons", was a series of animated cartoons produced in 1960 by New World Productions and syndicated by United Artists. It featured various folk tales, Greco-Roman myths, Biblical stories, some original stories by author Thornton Burgess, classic stories, even adaptations of classical music and ballet. The soundtracks were often taken from existing children's records, licensed from the original labels. 104 cartoons, each about 6 minutes long, were produced in limited animation.