ZoGuard Plus Flea and Tick Prevention for Dogs (Large - 45-88 lb)

Q: How can I find out what the expiration date is? I bought a ton of these and want to know how long they will be good for.

From the manufacturer: It does not have an expiration date. Always store product in its original container and at room temperature to ensure that it maintains its effectiveness. Unlike FDA products, EPA-registered products such as ZoGuard Plus do not carry a "stamped-on" shelf life or expiration date. However, the EPA does require a mandatory 2-year storage stability. Our products have satisfied the EPA requirement and well beyond.