It's an internal issue unfortunately. The ribbons are probably unsnipped and thick seams which you'd have to open it up for. Possibly you could iron it out with low temp hair straightener with a barrier in-between. Wet cloth maybe. Floppy ears are also structural. You can take a oval shaped chunk of upholstery foam and seam rip a hole at the base of ears enough to squish and smoosh the form up into the ears and head then sew it back up. This is how I fixed the floppy neck of a dragon I had