What objections did the sepoys have to the new cartridges that they were asked to use?

The new cartridges were unacceptable to the Indian sepoys, as they held the belief that these had been coated by the fat of cows and pigs. The sepoys had to bite the cartridges to load them. But their religion did not allow them even to touch these cartridges. Hence, they refused to use the new cartridges.