I can't find this imprint in any database.
Since you think it's a pet medication, it might be worth a call to Wyeth's Fort Dodge Animal Health Division.
Contact info is:
Fort Dodge Animal Health
9401 Indian Creek Parkway
Overland Park, KS 66210
Phone: 913-664-7000
Good luck. If you do call, please let us know what you find out. Thanks.
I'm not a pharmacist or a medical doctor. This message is not medical advice, nor is at an offer to provide medical advice. All drug identifications should be validated by a licensed MD or pharmacist.