>>63931>Aishah (May Allah be pleased with her) said: The Messenger of Allah (sallallaahu ’alayhi wa sallam) visited me after returning from a journey, and I had a shelf with a thin cloth curtain hanging over it and on which there were portraits. When he saw it, the colour of his face changed (because of anger) and he said, "O Aishah! the most grievous torment from Allah on the Day of Resurrection will be for those who imitate (Allah) in the act of His creation.'' `Aishah said: We tore it into pieces and made a cushion or two cushions out of that. [Al-Bukhari and Muslim]..
>Muslim :: Book 24 : Hadith 5246>A'isha reported that Gabriel (peace be upon him) made a promise with Allah's Messenger (may peace be upon him) to come at a definite hour; that hour came but he did not visit him. And there was in his hand (in the hand of Allah's Apostle) a staff. He threw it from his hand and said: Never has Allah or His messengers (angels) ever broken their promise. Then he cast a glance (and by chance) found a puppy under his cot and said: 'A'isha, when did this dog enter here? She said: By Allah, I don't know. He then commanded and it was turned out. Then Gabriel came and Allah's Messenger (may peace be upon him) said to him: You promised me and I waited for you, but you did not come, whereupon he said: It was the dog in your house which prevented me (to come), for we (angels) do not enter a house in which there is a dog or a picture.As you can clearly see, pictures of living creatures (besides trees) are haram. Dogs inside houses are haram too.