Even the pets can get in on a little St. Patty's Day savings over at Petco . Save some green while celebrating this Irish holiday with the St. Patty's Day Weekend Sale. It's packed with amazing deals, plus all orders will save 17% off and get free shipping if reaching $49 or more. Treat your pet to toys, supplies, over the counter medications and other needs before this sale ends on 03/17/2013. No coupon code is needed, this discount is taken automatically. Some restrictions may apply, see store for details.