Not a happy customer here today so I'm ranting and leaving a poor review. I was in 2 days ago to purchase an item for my dog when I got home and tried the item on it was too big for her. With receipt in hand and just needing to go down a size "even exchange " in mind. Nope not here not the case. I was told I owed $5.41 and I asked why since he items were identical and priced the same and she half a!! Explained since I used a coupon on the first purchase and after scanning the new item again identical I needed to pay the difference. I said can't you apply the coupon again she said no. Again I said same price same item different size even exchange she said no. I should have returned the original item for a refund then purchase second item. Their policy sucks and makes it tough and a way around the coupon and getting the balance out of you. Needless to say I won't be back and I'll hit a Petco going forward.