If I am allowed some sarcasm as well, that is anyway the "old" approach, a more modern one would involve (besides the connection to the cloud) a camera, a datab

If I am allowed some sarcasm as well, that is anyway the "old" approach, a more modern one would involve (besides the connection to the cloud) a camera, a database of "known" chickens and an AI (possibly a neural network) to identify (besides matching the actual authorized chicken wanting to enter with the image in the database) "chicken like" animals from "fox like" and similar ...