Abu Talha reported Allaah's Prophet (sallAllaahu alayhi wa sallam) having said:
"Angels do not enter a house in which there is a dog or a picture." [HR.
al-Bukhari and Muslim]
To answer your question, other animals that does not belong to the following categories are allowed to be taken care as a pet :
Animals that cause harm or ...
The short answer is that it was always the reading of the masses from the time of the Prophet (pbuh). I have copied a link to a lecture by Dr. Shehzad Saleem, in which he shows from very early sources that the common recitation before and even during the time of Imam Hafs was the same that we now call the Hafs recitation.