I'm not too sure what this beast was, but I have done a little article on the subject.
If this kind of information has been posted elsewhere , I apologize. I have done a search but I am not familiar with all the cp's yet.
This story happened in France between June 1764 and June 1767 and occurred in a place called Lozčre a district in france around Gevaudan
This beast was described as wolf like. Though nearly the size size of a cow. Its chest was wide, its tail long and thin with a lion-like tuft of fur at its end. Its snout was like that of a greyhound, and large fangs protruded from its formidable jaws. The beast was believed to be incredibly agile - it was credited with taking leaps of up to 30 feet . The Paris Gazette, carrying a story about the monster, commented that it was reddish in colour, that its chest was wide and grey, and that the hind legs were longer than the fore legs. Another account of the beast, published in the English Saint James' Chronicle, stated that the beast was probably a member of "a new species". Here we have what is quite possibly the first mention of the beast in a cryptozoological light.
La bete as she was called ,would mainly victimise women and children. The victims would be found with with their hearts and vital organs ripped out and throat wounds were on nearly all of the victims.
The first reprted encounter happened when a young woman was tending her flock of sheep. She saw this beast and her dogs were that frightened by it they ran away in fear. It was only her livestock of cows that stopped the beast attacking and it was pushed away by the horns of the cows.
Every effort was made to hunt this creature down, but every attempt failed and King Louis XV took a great interest in this case and sent his own men out to join in with the hunt for La Bette(French for the beast).
Many explanations of the nature of what this beast could be ranged from a mutated wolf to something of a prehistoric nature, some even thought it could be a werewolf.
In the three years that she terrorized the area, she had taken the lives of over 100 people. On at least 5 occasions beasts rumored to have been La Bęte ranging from large wolves to a baboon-like animal were killed but in all cases except the last, a not very formidable deformed wolf-like creature killed in June 1767, she recommenced killing shortly afterwards. For example, on 16th September 1764 a wolf known as Le Loup de Pradels was killed and assumed to be La Bęte. She took only until the 26th to kill a girl at Thorts and prove the assumption wrong. Following the death of a little girl on an unlucky 13th - only her bonnet and clogs were ever found - La Bęte was reported shot in an abbey estate by a M. Antoine as Le Loup de Chazes on 21st September 1765 but was seen at Marsillac on 26th, 27th and 28th of that month. She started a new two year killing career on 21st December, the shortest day of the year and a long Silent Night for little Agnes Mourges. The winter wind hid a very sharp bite indeed, and that Christmas cost Agnes more than the usual arm and a leg, 'insufficient remains for burial' , not enough to fill even a small stocking. La Bęte had herself a merry little Christmas and stopped the carol singers from making their usual killing because nobody dared open doors barricaded against her. Snowy New Year 1765 yielded, for example, the head of little Marie Jeanne Rousset of Milienettes, recognizable only by her staring eyes, everything else being cleanly gnawed away. One poor woman, over 60 years old, nick-named La Sarabande, after the triple-tempo Spanish dance, could find no grass for her cow , her only possession - because of the deep snow. She led it to a marshy area, where sometimes a little greenery penetrated through. La Sarabande’s body was ambushed for three days but the crafty la Bęte did not return. She liked marshy areas because her agility and relatively light weight enabled easy escape from mounted pursuers, whom she often deliberately led into mires and left floundering.
on 6th September 1764 at Estrets. A woman was tending her humble cottage garden when La Bęte seized her by the throat, beginning with her usual appertite for blood ( sucked, not stirred) and did not cease until neighbors armed with axes, sickles and forks arrived. The woman died but La Bęte, having enjoyed her liquid refreshment, lived on.
Three years later the monster was finally killed at the Sogne d'Aubert by a hermit named Jean Chastel.
So in conclusion this beast, could have been a number of things, but no one has ever been able to determine just what.
And so my answer is NOT SURE