I thought you were kidding...
From Bukhari Vol. 4, #448
Narrated Abu Talha: “I heard Allah’s Apostle saying; “Angels (of Mercy) do not enter a house wherein there is a dog or a picture of a living creature (a human being or an animal).””
From Bukhari Vol. 7, #843
Narrated Salim’s father: “Once Gabriel promised to visit the Prophet but he delayed and the Prophet got worried about that. At last he came out and found Gabriel and complained to him of his grief (for his delay). Gabriel said to him, “We do not enter a place in which there is a picture or a dog.””
From Muslim, #5276:
Abu Huraira reported Allah’s Messenger as saying: Angels do not accompany the travelers who have with them a dog and a bell.
I not sure what this means, but all my dogs have been bitches.
Actually true, but for only one out of three angels. That’s why dogs only bother Muslim angels.