Doggy Discounts

Four ways to slash pet expenses.

>> Adopt. You can pay $4,000 for that purebred puppy in the window or a fraction of that ($150) at Animal Care & Control (326 E. 110th St., nr. First Ave.; 212-788-4000). >> Buy drugs online. Most pet prescriptions—antihistamines, monthly heartworm creams—are a third cheaper online. Have your vet fax prescriptions to drsfosterandsmith.com or valleyvet.com. >> Save on surgery. You’ll spend roughly 50 percent less at the Humane Society of New York (306 E. 59th St., nr. Second Ave.; 212-752-4840). >> Get a sitter. New York’s kennels cost as much as other cities’ cheap motels. Set up a vacation pet-sitting exchange on Craigslist for free.