Shaun the Sheep at all, even from the human characters; simple grunts, bleats, pointing, sighs, mutterings, words, and similar wordless inflections are all used to indicate each character's moods and motives. There are also no readable words in any episode, although "Bitzer" can be seen on a dog bowl, and—in series four--"Mossy Bottom Farm" on a gate, in the original English-language title sequence. All other signage, such as on a pizza box or a bus stop, is replaced by an illegible scrawl and a picture. Shaun the Sheep's first appearance was in "Wallace & Gromit"s third short feature, the Academy Award-winning "A Close
International Sheep Dog Society (Collie Eye Anomaly) and PRA (Progressive Retinal Atrophy) through careful breeding and through the use of DNA tests. There are over 300,000 entries in the Stud Book, and thousands of new entries are added every year, either on the basis of parentage or if a dog has proved itself to be a good working example ("Registered on Merit"). The ISDS also promotes the training of young sheepdog handlers through a number of practical methods, some farm based, some competitive. The ISDS has several thousand members all over the world, currently enjoying the membership rights, which include the popular bimonthly magazine