New to Orchids and some question.

[hagfish]

Looks to me like one of the Dendrobium "nobile" hybrids. These are extremely common. Cane type Dendrobiums often tend to loose their leaves after the flowers fall. They undergo a dormancy and then new shoots form when the rains come. Many species are adapted to drought/monsoon seasonal cycles. I would say the hybrids tend not to need a dormancy. The holes in the stem look suspiciously like mouse damage. Mice are cute but are also incredibly destructive.