$3.00/1 – Sentry Pheremone Product, any – (coupons.com)

If you have cats or dogs, you know that sometimes they seem to get hyper for no apparent reason.  Certain pheremones are supposed to provide a calming influence on your pets, promoting good behavior.  Here’s a way to use your coupon at Petco:

Sentry Pheremone Good Behavior Collar for Cats or Dogs $9.99, Regular Price
Use $3.00/1 – Sentry Pheremone product, any – (coupons.com)
Final Price: $6.99