Ag-gag laws have been controversial since their inception in the early 1990s with Kansas passing the first law in 1990 followed by North Dakota and Montana passing laws in 1991. I used state level annual panel data and the synthetic control method to evaluate the effect of these laws on feeder cattle and hog inventories. These inventories act as a proxy for farm business investment. The results suggest that there was no effect on farm business investment for Kansas, North Dakota, and Montana over the time period of 1980 to 2010.