Some great advice in there.
I only have one nutrition concern and that is the blurb about Vit C. Cats can produce all the Vit C they need, even those cats who are eating their natural diet of rodents/birds. Vit C can actually increase the acidity in the urine causing a formation of calcium oxalate stones and therefore I would hesitate to add any Vit C to a cat's diet unless under Vet care (or any other vitamins/minerals for that matter).
Cat maid to:
Puddles, female Himalayan (16 yrs)
Jasper, male Ragdoll ?? (approx 9 yrs)
Sweet Pea, female silver tabby DSH (approx 7 yrs)
Rose semi feral, a cpietra rescue, female tabby (approx 6 yrs)
Snowball RIP (1991-2005)
In a cat's eye, all things belong to cats.-English Proverb
“While we are free to choose our actions, we are not free to choose the consequences of our actions.” Stephen R. Covey