Since it's been awhile, I'll give another two hints.
Hint #6: The answer to Hint #2 is silver. The answer is not silver and gold; just silver.
Hint #7: Based on all the previous hints, the following can be inferred:
This cat is a non-diluted silver caliby.
What still needs to be guessed is whether the base color is black, chocolate, or cinnamon,
and what type of tabby the cat is (mackerel, broken mackerel, classic, marbled, spotted, rosetted, or ticked).