A survey of analysts suggests that the total hog inventory on December 1st was 65.7 million head, down 0.9% from one year ago.
The estimates for animals kept for breeding averaged 0.7% below a year ago at 5.7 million head.
Analysts expect supplies of hogs kept for marketing to be 0.9% below a year ago.
Traders will also be watching the pigs saved per litter data, as efficiencies in that area have consistently boosted supplies in recent years.
The quarterly Hogs & Pigs report from USDA will be released at 2:00 p.m. on Friday.