You must promise me that you will keep this secret only between me and you. The following is my (Method) of sexing canaries at any age : Turn your home faucet ON and make sure that the running water is warm(not hot, not cold). Then put your canary vent under the water for almost 2 minutes until you get all his/her feathers around the vent wet. If he is a male his vent will pop out if she is a female her vent will sink down in to her belly or some times her vent level will stay even with her belly. Đã test thử và thấy đúng. Sưu tầm trên internet.