The Mastín Español or Spanish Mastiff, is a giant breed of dog, originating in Spain, originally bred to be a guard dog whose specialized purpose is to be a Livestock guardian dog protecting flocks (and occasionally herds) from wolves and other predators. The Mountain dog type has a heavier coat.
The Mastín Español needs to eat a lot of food.
It's a giant breed of dog therefore it requires a lot of food in order to survive. It's difficult because nothing is mentioned in the text about food so the system thinks the statement cannot be answered.