What month do they have the program for low income family to have their animals spayed and get shots and micro chips.

Hey Cynthia, our low-cost spay and neuter program is continuous -- and our vaccine and microchip clinic is weekly! You can see more info here: https://nevadahumanesociety.org/veterinary-clinic-services/

The SPCA will make appt. I think they charge by the weight of the dog/pets

In January, you'll need a voucher first though.

I have no idea. You will have to contact them.