Cremating pets and my rights

My beautiful baby is getting older and sicker. She's still got some time left but I want to make sure I have plans in place for the inevitable. I know most of the funeral homes in my town offer cremation for pets, but I absolutely want to be present when they cremate her. I know for family they let you be present and sometimes let you push the button to start. Is there any reason why this would not be ok with pets? I'm willing to call and fight if I have to but I want to make sure it really is within my rights to be present when my pet is cremated.