I would block access through the fence first. Second, depending on your relationship with your neighbor, I'd probably mention or ask if they had taken a piece of the plant and that you'd prefer they at least ask first the next time. Hopefully, they'll offer the keiki back or something else in return? If the relationship is poor, make the first option even more secure.

Are you sure it was them?

Bob

yes they have been looking at the plant since i bought it the watch that plant till the flowers open even more than me and we have a good relationship so i dont want to mess that up i moved the plant and thanks

Buy them a plant , take it over there and tell them you need a buddy to go to orchid society meetings with. You'll both benefit and make new friends. Ginnibug

Are you sure it was your neighbor? We have ground hogs and rabbits and other nocturnal critters that just love new young shoots, and they bite them off as cleanly as if they used sheers.

i am sure we dont have ground hogs in trinidad the caribbean