Rare carnivore attacks livestock!

I have been travelling over the weekend to a neighboring ranch called Eselenkei. On my journey I came across a livestock owner who was very angry because two of his animals had been killed by a carnivore that he claims to be very rare.

He told me that the attack had happened at around 5.30 in the early evening and that his young herder had seen the carnivores. As well as the two killed, four young calves were left with injuries, but luckily they will survive. So, what do you think these rare carnivores were? Here are some of the tracks that I saw. Can you help identify them?

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