Am re-watching Akira Kurosawa's Stray Dog (1949) on the excellent Criterion Collection DVD. The mini doc recounts a stir over the opening shot of a dog panting feverishly. The film premiered during the American occupation of Japan, and a busybody American woman associated with the ASPCA accused Kurosawa of having injected the dog with rabies to get that wild-eyed effect. This was in the wake of post-war revelations about "scientific" experiments performed by the Japanese imperial army. Apparently this woman was persistent, obsessed even, and brought suit. Was the one blot on an otherwise happy production.
Of course, to get the shot Kurosawa simply had his team take the dog on a run for a few minutes on a hot day.