For years I've always boiled tap water for 1 minute, then added the sugar, then let completely cool off before filling the feeders.   Since the cool off time could take an hour, I have tried something I read which is to only boil half the water so that the sugar can fully dissolve, then adding cool tap water for the remainder.  This was very easy and cut out the cool off time completely...but the birds don't seem to like the sugar water now.  What could that taste differently...could the cool tap water have too much chlorine taste?   

Old age is not a disease. Improved nutrition and exercise, as well as advances in veterinary medicine, result in longer and healthier lives for our pets. Although your pet’s health as he ages is not entirely in your control, you play a critical role in keeping him active and comfortable. Being aware of the natural changes that can occur will ensure that you both enjoy this stage in his or her life.