Alaska State Troopers served a search warrant at Wolf Country USA in Palmer Thursday, triggered by complaints that the tourist business is selling hybrid wolves, which is against state law.
Investigators shut the business down temporarily, so they could tranquilize animals kept there and take DNA samples.
Troopers say new DNA technology will enable them to determine if the animals are hybrid wolves.
The Wolf Country USA owner, Warner Schuster, says he has about 40 wolves, which include 12 puppies.
Schuster says he's done nothing illegal.
So far Troopers have not filed any charges against Schuster.