What role do pets play in Karissa Fox's life with chronic illness?

I'm sorry, but based on the information provided, there's no mention of pets in Karissa Fox's life or how they relate to her experience with chronic illness. Karissa shares a lot about her journey with chronic illness, her healing process, and her role as an aunt, but pets aren't mentioned in these specific posts. If you have any other questions about Karissa or her experiences, feel free to ask!