Siamese snake twins Katana and Wakizashi have cleared an important health hurdle after a trip to the vet.

Their owner, Wodonga snake breeder John McNamara, said an exploratory tube was used to see if there were any restrictions in their throats.

Breeder John McNamara with his rare snake. Credit:Mark Jesser

"They both went down to the stomach so they're completely separate … sharing one stomach; they should be sharing all the same organs but just have two heads and two throats," he said.

"[Their] brothers and sisters have shed now and five have eaten so they're going good.