Q. 1. Are pets allowed in Church? I have a dog who is so well behaved that I am sure he would enjoy accompanying me to Church. I am sure he would behave during Mass.
A. 1. Animals are not allowed in the Catholic Church during the Holy Mass because the liturgy is the gathering of the Mystical Body of Christ, the gathering of all the baptised who come to worship as the people of God. Animals, including your dog, not having a soul, are unable to worship God. Accordingly, they have no place in the Church. This reinforces the fact that dogs and other animals do not go to Heaven when they die.
The only exception is for service dogs who guide the blind to ensure that the faithful member of the Church can find his/her way around.
While dogs or cats may have a special place in the heart of a person, only humans have the privilege and the obligation to praise God by partipating in the liturgy.