I’ve done Barf several times, and it’s always a hit in public.

I made a tail that came out of my pants and had 2 bent coathangers run parallel to eack other inside the cloth for support that went into the pants and were bent back up and around, came out the top of the pants and wrapped around my belt.

That made the tail stand at whatever angle I wanted by bending the coathangers, but when I walked it had a great, natural bounce and wag.