Carnivorous Squirrel?

Carnivorous Squirrel?

Observation - Carnivorous Squirrel?. Description: Observed over a couple of days, initially the squirrel concentrated on getting the mixture out of the centre of a bone left in the garden by the dog. Then it was observed attacking the bone itself, gnawing off the edge as can be seen in the picture. Is

Observed over a couple of days, initially the squirrel concentrated on getting the mixture out of the centre of a bone left in the garden by the dog. Then it was observed attacking the bone itself, gnawing off the edge as can be seen in the picture. Is it just adding calcium?