Also, the FDA wrote a warning letter to Merrick that can be read here:
Tejas Industries Inc. 6/1/10
In addition, the FDA has a number of "Import Refusal" documents showing some salmonella problems with Acana Grasslands. The violation cited in the report was --
Violation 402(a)(1), 801(a)(3); ADULTERATION The article appears to contain Salmonella, a poisonous and deleterious substance which may render it injurious to health.
The whole list can be seen here:
Search Results: Acana site:www.accessdata.fda.gov/scripts/importrefusals/ir_detail.cfm