Go to the food shop. Buy any type of food for 5 coins. Buy about 55 of them. Go to the cafe feed another people's pets. You will get 17 paw points.

Purchase lots of food worth 5 coins or less. Feed your friends who are hungry until they are full. Note: You can also feed yourself and cafe pets. Every time you feed them, you will earn 17 paw points. For example, buy 99 apples worth 5 coins and then feed all of them to your hungry friends to gain 1683 paw points at the cost of 495 coins.