A stray cat is carried by a veterinarian after being operated during a community campaign for the sterilisation and deworming of dogs and cats in Havana, Cuba February 25, 2016. (Photo by Reuters/Stringer)





U.S. veterinarian Amanda Bruce operates on a cat during a community campaign for the sterilisation and deworming of dogs and cats in Havana, Cuba February 25, 2016. (Photo by Reuters/Stringer)





A cat undergoes an operation during a community campaign for the sterilisation and deworming of dogs and cats in Havana, Cuba February 25, 2016. Picture taken February 25, 2016. (Photo by Reuters/Stringer)





U.S. veterinarian Michael Belovich prepares to operate on a dog during a community campaign for the sterilisation and deworming of dogs and cats in Havana, Cuba February 25, 2016. (Photo by Reuters/Stringer)





Cuban and U.S. veterinarians feed cats and dogs after the animals were operated on during a community campaign for the sterilisation and deworming of dogs and cats in Havana, Cuba February 25, 2016. (Photo by Reuters/Stringer)





Susana Despaine and Dayanis Alvarez bring home their dogs after the pets were examined by veterinarians during a community campaign for sterilisation and deworming of dogs and cats in Havana, Cuba February 25, 2016. (Photo by Reuters/Stringer)





A cat named Leo waits inside his owner's backpack for its turn to be examined by veterinarians during a community campaign for the sterilisation and deworming of dogs and cats in Havana, Cuba February 25, 2016. (Photo by Reuters/Stringer)





Dogs, Pretty, Llilly, and Rocky wait for their turn to be examined by veterinarians during a community campaign for the sterilisation and deworming of dogs and cats in Havana, Cuba February 25, 2016. (Photo by Reuters/Stringer)





William Garcia holds his dog Diana during a community campaign for the sterilisation and deworming of dogs and cats in Havana, Cuba February 25, 2016. (Photo by Reuters/Stringer)





A stray cat is carried in a cage to be examined by a veterinarian during a community campaign for sterilisation and deworming of dogs and cats in Havana, Cuba February 25, 2016. (Photo by Reuters/Stringer)