Sun Dog is a yellow pegasus and the twin sister of Moon Dog.
Sun Dog is a yellow Pegasus with an orange mane.
Sun Dog was born with her younger twin Moon Dog in Clousdale. She attended Flight School and graduated with her Cutie Mark. Sun Dog still lives in Cloudsdale unlike her brother who now lives in Ponyville. Sun Dog visits her brother from time to time.
- A Sun Dog is an atmospheric phenomenon that creates bright spots of light in the sky, often on a luminous ring or halo on either side of the sun.