Case C-836/19: Judgment of the Court (Fourth Chamber) of 2 September 2021 (reference for a preliminary ruling from the Verwaltungsgericht Gera — Germany) — Toropet Ltd. v Landkreis Greiz (Reference for a preliminary ruling — Public health — Health rules concerning animal by-products not intended for human consumption — Regulation (EC) No 1069/2009 — Article 9(d) and Article 10(a) and (f) — Classification of products — Decomposition, deterioration and presence of foreign bodies in the material — Impact on the initial classification)