Dog hit on a leash.

Hello friends! Have a strange situation: An acquaintance of mine was on the way to Berlin. On a wide street, which was slightly bent off, he quickly turned off, but at the time a dog was still on the road and was hit and injured. The owner had crossed it on the leash and apparently just the road. (No traffic light, no zebra strip.) What’s the matter now, the acquaintance must pay for the annoying treatment of the animal / pay a new animal or was the Hun dehalter to blame and the scratches on the car are paid by the insurance of the dog? Best greetings,