It was interesting to see the photograph in your print edition captioned “Hound of the Serpentine” (18 May). There are big notices around the lake stating that, to protect the wildlife, dogs must be kept on leads and must not be allowed in the lake. Adrianne LeManLondonMake sure your pet is in good company. Pets get lonely and depressed just like people do when they spend too much time alone. Cats are generally better on their own, but dogs and especially puppies don’t do well left to their own devices for extended periods of time.