Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: The Messenger of Allah (peace and blessings be upon him) forbade the jallalah sheep (one that eats filth), the price of a dog, the fee for a stud's mating, and the earnings of the cupper.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11642