by Pajarita » Wed Oct 22, 2014 10:21 am
First of all, sorry for your loss. It could not have been a blood feather or a night fright. Contrary to popular belief, birds don't bleed to death from a blood feather and a night fright would have possibly caused something as serious as a broken wing but not a wound that would make her bleed to death as that would have had to have been a puncture wound. But I doubt she died from blood loss, it was, most likely, shock from it and not the actual blood loss itself (first thing you need to do with a bleeding bird is give it heat -85 to 95 degrees- and complete quiet because without them, they die). It could have been the male, especially if he was been aggressive before. Males are never aggressive with their mates, it just doesn't happen in nature, It happens in captivity but it's always because there are abnormal circumstances which, in this case, I would say it was sexual frustration. Cockatiels don't have sex or lay eggs all year round and they are not even producing sexual hormones this time of the year, the days are too short, so you must have been keeping them at a human light schedule (lights on before the sun is out and after the sunset). Sexually frustrated males do attack and even kill not only the females but also the babies (not their fault, they are in constant pain).
First of all, you need to figure out how to keep him to a solar schedule with full exposure to dawn and dusk and that means no artificial lights before the sun is out (this time of the year 8 am or later) or after the sun is halfway down to the horizon (this time of the year 4:45 pm or earlier). Take the box out of the cage (it just makes things worse) and reduce his protein intake (I don't know what kind of diet you had them on but they should not be free-fed their protein food -seeds, pellets, nutriberries, etc).
As to his calling, yes, he is calling for her not only because he misses her but also because he needs to have sex so, personally, I would get him another mate (they always do better in pairs, it's the way nature meant for them to live) but I would wait about a month or two before I allow them to be together (his sexual hormones levels need to decrease).