There are a few different names for Chronic Kidney Disease (CKD), but they all mean the same thing. Some other names for this disease are Chronic Renal Failure (CRF) and Renal Insufficiency are two other names this disease goes by.
Chronic Kidney Disease is an ongoing process that slowly causes loss of kidney function. This disease is very complex, and affects a lot of other processes in the body.
Disease Information Sites
The absolute best website I have ever seen for this disease is Tanya’s Comprehensive Guide to Feline Chronic Kidney Disease.
Feline CRF Notebook contains a lot of companion information, helpful calculators, and tools for caregivers.
My favorite support group for CKD is Tanya’s Support Group, although I might be playing favorites here, because I am a member of that group myself.
Cats with Multiple Medical Problems is a very good Facebook group for finding information and support. There are many other groups on Facebook related to cats with kidney disease but, in my experience, most of the other groups are full of incorrect and/or dangerous information and pseudoscientific nonsense.