Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Saw big changes in the pup

Three years ago I rescued two mill breeder Yorkies. They were both in bad shape. Both had trouble walking being locked in stacked cages for years. And even though in time they learned to love the leash and their walks I still saw that they limped on many occasions. Cosequin was recommended and after using it for over a month I saw a vast difference in one of them. She now runs and leaps over small obstacles with the greatest of ease. I believe the Cosequin was responsible for that. My other little one doesn't seem to tolerate it very well. But to be fair she has chronic gastric upsets and this product like many other things seems to upset her stomach. But I am thrilled that it has worked for at least one of them. If you have small dogs one bottle will last a year as I sprinkle half a capsule once a day on her food.