Write a paraphrase for this text
They would have to let the animals graze when they reached some grasses, but Martin knew that, with the demands placed upon the animals, they would have to have more than grass if they were to finish out the journey.
If they'd discovered any grass, they'd let 'em eat, but Martin was aware that given the claims they'd imposed on them, they'd have to get a lot less than grass to complete the journey.