Do you give to animal charities?

If you really have extra money to go around, then it might be a better idea to adopt a few more homeless pets from the shelters.
If you absolutely want to donate some cash, maybe send it to some no-killing shelters. I personally believe working as volunteer at animal shelters is a better way to help with the cause. So is spending some time on the pet forums to educate people about how to take care of their animals correctly.