Sandy my Chihuahua loves miniature tennis balls. One day he ate the fuzz off the outside of his green ball. Several hours later he wasn't feeling good and would not eat or drink water. He began throwing up. I raced to the emergency vet at 8:30 at night. I was especially concerned because Sandy has been my best buddy and support since my husband passed away. After spending the night at the vet, and being on fluids he was100% the next morning. Petfirst saved me from a huge vet bill.....thank you Petfirst.