Even though the animals are hungry, Squealer has a bunch of figures that say

From the text:

There were times when it seemed to the animals that they worked longer hours and fed no better than they had done in Jones's day. On Sunday mornings Squealer, holding down a long strip of paper with his trotter, would read out to them lists of figures proving that the production of every class of foodstuff had increased by two hundred per cent, three hundred per cent, or five hundred per cent, as the case might be. The animals saw no reason to disbelieve him, especially as they could no longer remember very clearly what conditions had been like before the Rebellion. All the same, there were days when they felt that they would sooner have had less figures and more food.Ch 8