A joke about the train

A riddle,

3 lions board the MRT train at Khatib Station, they intend to head to Orchard Station.

1 Station later at Yio Chu Kang Station, 10 sheeps board the train heading to Orchard Station as well.

How many sheep manage to alight at Orchard Station eventually?

The Answer: All the 10 sheeps alight at Orchard Station, so did all the 3 lions.

Why????

"Eating and drinking are not allowed in the train or at the platform area"