She said the owners have "lost their house and everything in the flood".
"They couldn't get any access to their floats or anything. They needed help getting those horses out of there as soon as possible."
All the horses were uninjured during the ordeal but the stress was visible, according to the SPCA.
"They had to put a lot of trust in us to get them out of there. Some of them were younger horses as well - they did amazingly well for a very stressful situation," Hickey said.
The SPCA building in Napier also suffered from minor flooding, meaning all dogs were transported to the Hastings branch as a precaution.
An Animal Evac New Zealand spokesman said they are in touch with the Ministry for Primary Industries, which is offering the assistance of trained animal disaster responders, who are also trained in flood safety.
"At this stage, no requests for animal assistance have been received by authorities," he said.
Animal Evac have two inflatable rescue sleds in Wellington on standby, ready to be pre-deployed if requested.