Mr Gilmour said Harriet, who stands at 18ft, is one of the tallest female giraffes he has seen. She and Keisha have now joined the other females in the park's herd: Bella, three, Ruby, four, and Kelly, 12.
"The move went great and they have been calm the whole time. They are still getting used to the change but both have been out exploring their new home," Mr Gilmour said.
"Harriet is a really friendly giraffe and has mixed well with our girls, but Keisha is a bit stand-offish and not too sure at the moment, which is a bit surprising as she is the tallest of them all, at around 18ft."
Giraffes are the world's tallest mammals and can run at speeds of 35mph over short distances.