I have to confess that my first reaction to your post was “This HAS TO BE a troll.”
Usually when we have instructions from the Church on anything it’s
*]about something that is normally done and how to do it, or
*]about something we should not be doing but which so many are doing that it has become a problem.
Just because there is no document that says you can’t do somersaults in the sanctuary during Mass doesn’t mean you are free to do so. Somehow I don’t think the Church has ever envisioned people putting crosses and scapulars on their pets so has, up to now, not felt it necessary to put out a ‘do not do this’ document.
Personally, I think putting a scapular on a dog it is very disrespectful and could be seen as mocking the Catholic religion. It would be the first thing that comes to my mind if I saw someone’s pet so bedecked.
I had the same reaction to what I saw in the pet cemetery that illegally developed in a large green space in my town. I commented to my husband that based on the number of crosses on these graves that there was an inordinate number of Christian cats and dogs in the area. You want a grave marker for your pet, fine, but I find it distasteful to include religious symbols on the grave of an animal.