Weeks after a tiger at the Bronx Zoo was diagnosed with coronavirus, the zoo said Thursday that four more tigers and three lions were infected.

Earlier this month, the Bronx Zoo announced a four-year-old Malayan tiger tested positive, while six other big cats were showing similar symptoms.

All six have now been confirmed to have the virus, along with another tiger that never developed a cough.

Zoo officials say all eight big cats are doing well, behaving normally and eating well. The zoo says their coughing is greatly reduced.

The testing was done in veterinary labs and did not take away any resources being used for human testing, according to the zoo.

The zoo says the cats were infected by a staffer who was asymptomatically infected before that person developed symptoms.