One deduction that many people are unaware with is associated with fostering pets. If you foster for a 501(c)(3) not-for-profit organization, the money you spend on food, vet bills, and even mileage can be considered gifts to charity and included as itemized deductions on Schedule A of your tax return. Unfortunately, this only applies to foster pets and not your household pets.
In the court case that decided these were legitimate deductions, the taxpayer was allowed more than $12,000 in deductions. If you do include these expenses on your return, be sure you keep your receipts.