V1. The biggest problem that this breed lived before 1900s, so we have not so much fotos of Medelian dogs. I recover the dog view. This is just a start.
i used next promtps to create real dog view from this model:

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one dog, solo, a very large heavy russian medelyan mastiff, rectangular build, body significantly longer than height, low-set massive body, short strong legs, broad paws, massive broad head, heavy jowls, wide blunt muzzle, thick powerful neck, short dense rough fur, fawn and white markings, thick heavy tail hanging down, standing on grass, natural yard setting, black and white photo, documentary style, film grain, candid shot, high contrast

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curled tail, fluffy tail, feathering, long fur, wavy fur, elegant, slim, tall, leggy, thin, small head, pointed muzzle, smooth skin, plastic texture

• CFG: 6.0 .

• Sampler: DPM++ 2M Karras or Euler a.

• Steps: 25 .