Fred is right one here. My indigos have had perfect fertility rates over the past four years. And even though good husbandry has a lot to do with it, a major factor, in my opinion, is proper diet. My indigos get a varied diet of different sized mice, small rats, 1-week old quail, and even baby bunnies. My indigos absolutely LOVE feeding time because they never know what is coming; their feeding response is sensational. Each prey item has certain nutrients that may be missing in others so this varied diet, along with regular vitamin/mineral supplementation are critical components to successful husbandry of this species.
Rob Carmichael, Curator
The Wildlife Discovery Center at Elawa Farm
City of Lake Forest Parks & Recreation (IL)