It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The mouse is a transformed (metamorphosed) creature, and the sign of that is that it drinks goats' milk but does not drink camels' milk."
No one narrated this hadith as marfu' (from the Prophet) from Ibn Awn (may Allah have mercy on him) except Isma'il bin Ayyash (may Allah have mercy on him), and from Isma'il (may Allah have mercy on him) only Baqiyyah (may Allah have mercy on him), while Musa bin Ayyub (may Allah have mercy on him) is alone in narrating it.
Hadith Referenceالمعجم الأوسط / باب الميم / 6662
Hadith Takhrij«أخرجه مسلم فى «صحيحه» برقم: 2997، وأحمد فى «مسنده» برقم: 7865، 9450، 10744، وأبو يعلى فى «مسنده» برقم: 6061، وعبد الرزاق فى «مصنفه» برقم: 8399، والطبراني فى «الصغير» برقم: 886»