Sorry, no experience.

I just did a google search with these items:

animal rescue grant money

Several places came up.

Also check the large institutions:
HSUS, Animal Planet, Cat Fancy Magazine, things like that. I know I saw something about 3 months back in Cat Fancy, of a place giving $5000 grants.


Also check: PetCo Charitable Fund, PetsMart Charitable Fund (these could be Foundation, not sure), and your local state's veterinary association!
Good luck!