Cuba killed U.S. diplomats' pets?

The Hill reports that in 2007 Cuba poisoned the pet animals of U.S. diplomats working in the country:

The 64-page report written in 2007 states that the life of U.S. diplomats serving in the U.S. Interest Section (USINT) - which issues visas and performs other diplomatic services in Havana - was laden with poor morale "in part because USINT life in Havana is life with a government that ‘let's [sic] you know it's hostile'"....

"Retaliations have ranged from the petty to the poisoning of family pets. The regime has recently gone to great lengths to harass some employees by holding up household goods and consumable shipments. The apparent goal has been to instigate dissension within USINT ranks."  

The report comes just as the Obama administration is attempting to strengthen relations and ease strictures on the Communist country. Which begs the question: who decided it release it now?