Morrisons became the first supermarket to print portion control labels on its petfood products, in an effort to control rising obesity in dogs and cats, according to UK's mailonline.com.

"We’ve had feedback from our customers which says that they are often in the dark about how much food they should be buying and giving their pet," said John Cannan, product development manager for petfood at Morrisons.

The MailOnline article cites research that found 36% of dogs and 29% of cats treated by veterinarians are obese. To fight obesity and pet depression, veterinarians say small dogs need at least 30 minutes of exercise daily and large dogs require more than this. The article points out that giving a cat one saucer of milk is the equivalent of four cheeseburgers, which emphasizes the importance of controlling what pets eat.