Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) says that the Messenger of Allah (peace and blessings be upon him) forbade that the meat of the jallalah (the animal that feeds on filth) be eaten, that its milk be drunk, or that loads be carried on it (the narrator says: I think he (peace and blessings be upon him) said: except leather), and that people ride it until it has been given (clean) fodder for forty nights.
This narration is not strong.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19480