TRAVERSE CITY, MICH. (AP) - Federal officials are taking another look at proposed rules designed to contain a fish-killing virus in the Great Lakes region after critics said they were unreasonable.

The U.S. Department of Agriculture announced the rules last month. They require testing and inspections of 28 farm-raised and live bait species susceptible to viral hemorrhagic septicemia, or VHS.

The virus kills fish but doesn't harm people. It has been detected in all the Great Lakes except Lake Superior.

The regulations were scheduled to take effect Nov. 10. But the agency said Oct. 28 it is pushing back the date until Jan. 9 so it can consider public comments and possibly make changes.

Some fish farmers and wholesalers say the rules would make demands and impose costs that could drive them out of business.