You can also write your State Senator or Assemblyman to pass a law like we have in NY. For each un-altered kitten we adopt out, we have to collect a $35 fee which will be reimbursed upon proof of alter. This is such a new law that the jury is out whether it's effective.

Volunteer groups are always looking for fundraising help. This includes hitting up merchants for donations for raffles/penny socials, etc. Also setting up/tearing down, putting up posters, vet and delivery runs for cats, publicity...Use your imagination! Only time required, no money.