TOPEKA (AP) – Federal investigators allege in an administrative complaint that the Topeka Zoo violated animal welfare regulations.

The Topeka Capital-Journal reports that the complaint was filed by the administrator of the Animal and Plant Health Inspection Service.

The complaint alleges the zoo “willfully violated” the Animal Welfare Act during 11 inspections between April 2007 and July 2011. The violations include several instances of not providing adequate veterinary care, failing to correctly handle animals and failing to establish and maintain veterinary care programs.

Topeka interim city manager Dan Stanley said Wednesday that the report paints “a very disturbing” picture of zoo operations during a “troubling period” of its history.

Zoo director Brendan Wiley said he and his staff are changing the zoo’s culture, but “this isn’t something that will be overcome overnight.”