No regulations regarding feline hybrids can be found. However, it is important to check with your state and local governments prior to acquiring a hybrid cat.
All generations of hybrids are illegal in Seattle, WA
Seattle Municipal Code 9.25.020 – M; and 0.25.053: http://clerk.seattle.gov/~scripts/nph-brs.exe?d=CBOR&s1=121178.ordn.&Sect6=HITOFF&l=20&p=1&u=/~public/cbor2.htm&r=1&f=G
All generations of canine hybrids are illegal in King County: http://www.kingcounty.gov/council/legislation/kc_code/14_Title_11.aspx
11.28.020 Definitions. The definitions in this section apply throughout this chapter unless the context clearly requires otherwise.
C-5. Nondomesticated species of canines and their hybrids, including wolf and coyote hybrids;
In addition, from Tim Anderson of the King County Animal Control specifically addresses Savannah ownership:
While some federal and state agencies consider a Savannah to be a hybrid, obviously no agency considered it to be wild. Under King County Code 11.28.020 (C) (4) only nondomesticated species of felines would be considered an exotic animal. Unlike canines it does not refer to hybrid felines.
Tim Anderson | Sergeant
Regional Animal Services of King County
(206) 296-3945 Phone
(206) 205-8043 Fax
Washington law does not prohibit people from possessing wolf hybrids.
Revised Code of Washington (RCW) 16.30.
Dangerous Wild Animals
Criminal Justice Liaison and
Administrative Regulations Coordinator
Washington Department of Fish and Wildlife
preuslmp @ dfw.wa.gov
Disclaimer: Please check all local, city, county, township, homeowners’ ordinances in your area first before acquiring any hybrid or exotic animals.