Here are some links to other organizations and professionals who offer accurate, useful, and reliable information on everything cat-related! All of us here at Crystal Creek Rescue personally use these on a regular basis and have found them incredibly educational.
The PAW Project – a nonprofit organization who advocates for the end of declawing: https://pawproject.org/
Alley Cat Allies – a national organization that advocates tirelessly for cats, providing lots of high-quality information on caring for feral cats and kittens: https://www.alleycat.org/
The Humane Society of the United States – a landmark institution that works to end suffering for all animals.Their resources on cats can be found here: https://www.humanesociety.org/animals/cats
Kitten Lady – an educator and orphaned kitten care reference: http://www.kittenlady.org/ Find her on YouTube as well: https://www.youtube.com/playlist?list=PLZyDy7gy9vwr0m119g5poGvgHM-4Wxv80
UC Davis Koret Shelter Medicine Program – a comprehensive, evidence-based resource to animal health focusing on shelters: https://www.sheltermedicine.com/