Expenses for rescue dogs may include:
Spay/neuter;
Vaccinations;
Fecal and heart worm tests;
Mandatory medications;
Corrective surgical procedures;
Repair of injuries;
Euthanasia (when necessary);
Animal shelter release fees;
Boarding fees; (for quarantine of contagious or possibly contagious rescues)
Micro-chipping;
Transportation in areas where volunteers can not be found;
Crates;
Any other necessary cost incurred
Administrative costs:
Web site hosting
Phone bills (mostly long distance)
Forms routing service fee
Legal/Professional fees
Postage (for reimbursing volunteers, etc)