Petco has 13-ounce cans of Canidae dog food on sale: buy five get one free. These cans are sold for as low as $2.29. Buy six and use a $2.00/4 coupon at the register. Final price: only $1.58 each!

Buy Five Get One Free through 8/6

Use one $2.00/4Canidae Dog or Cat Food Cans (canidae.com)

Final Price: $1.58 each, when you buy 6