Harringtons Puppy & Junior Treats are a complementary pet food suitable for all dogs from 8 weeks old. Natural healthy treats containing no artificial colours or flavours, no added sugar, no soya and no added wheat. Feeding Guide - Harringtons Dog Treats are a complementary pet food suitable for all dogs from 8 weeks old. To keep your dog in a trim, healthy condition, treats should be used sparingly. When feeding treats as part of your dogs daily routine, you may need to adjust the amount of food you are feeding your dog at mealtimes.