Jasper's Special Lemonade

It is the day of the school fête and Emma has cooked lots of cakes to sell. Jasper decides to make some lemonade to sell to the kids. To his amazement nobody seems to like his lemonade. What could be wrong with squid, mackerel and herring lemonade? Jasper finds he has a new type of customer, because cats just love his special lemonade.