Fake or dummy eggs will help stop or minimize egg laying. Simply slip a few of these in the nest box when your Finch or Canary lay their first egg. These eggs are reusable over and over. You can also replace the natural egg with a fake egg to prevent it from hatching. Keep eggs in the nest until they get bored, otherwise they will continue to lay more. After 26 to 29 days your bird should be ready to leave her nest and it is safe to remove all eggs. Finch and Canaries lay approximately 6 to 9 eggs. Approximately 16 mm x 13 mm. Package of 6