A brief documentary by Zahi Hawass, head of Egyptian antiquities, examined exactly who built the pyramids. Hawass talks about a burial chamber found in proximity to Giza which he calls a worker's tomb. From the evidence, accordingly, the workers were treated similar to royalty as far as burial method, that they were not slaves or treated as slaves. An online article about this discovery claims it took 10,000 workers, who ate 21 cattle and 23 sheep sent to them daily, more than 30 years to complete the construction. According to a bone study, most of the workers had significant cases of arthritis and lower vertebrae problems.
The numbers state pyramid building was fueled by at least 229,950 cattle and 251,850 sheep over the 30 year period. On average in 2013 by the USDA livestock report, consumers in the US ate roughly 0.0086 cattle, and 0.000675 sheep per person. Might add in here too, 0.0326 average pigs were also consumed per person during the period for reference. Pyramid builders averaged to 0.77 cattle and 0.84 sheep per person per year. This means Egyptian workers were comparatively and significantly, very much, well-fed for their efforts. On the other hand, it's quite possible either a number of workers are not accounted for, or there is a discrepancy in the food consumption numbers found in worker tomb hieroglyphs. Extra protein would be necessary for the work labor involved, however, does that necessarily equate to 3 lbs or more meat per day, per person?