Being a responsible pet owner can be expensive. Here’s one freebie to help you with your duty.

My Favorite Pet Shop is offering one free roll of pet waste bags with free shipping if you “like” its Facebook page.

But you have to be quick to get this one. The freebie begins today at 9 p.m. ESTand only 200 rolls are being given away.

If you want a shot at one, go to www.facebook.com/myfavoritepetshop tonight at 9 and click on waste bags freebie.