by Pajarita » Sat Mar 21, 2015 12:07 pm
Regurgitation is never a 'psychological' problem (it always amazes me how little avian vets know about bird behaviors!), it's always due to sexual hormones and not the normal amount, either. A bird has to be overly hormonal to do this on their own so, yes, light schedule and diet is what is causing it. And, although regurgitation is normal for a bird, it's only normal for a short period of time (the male feeding the hen and the hen -and the male- feeding the babies). It's not good when they do it all the time because it causes a strain on their throats (imagine throwing up all the time) and muscles.
Now, 8:00 pm is not too, too bad although all my birds are already fast asleep by then even this time of the year (I cover them at 7:30 pm right now) - and 6 am is not too bad although I uncover mine at 6:30 and don't turn on the overhead lights until 7:30 am, but if this is the schedule you've been keeping her at throughout her four years, the poor bird is, most definitely, overly hormonal! Think about it, that means a solid 14 hours of light, something only achieved in nature at the height of the breeding season!
Her diet has also been way too high in protein. GCC are mainly fruit eaters in the wild and actually require not that much protein so all those seeds and pellets are not doing her any good. Mine eats gloop with raw produce for breakfast and all day picking and a small amount of seeds for dinner. Now, you can do chop, mash or gloop (my birds prefer gloop so that's what they get) so you can take your pick for her breakfast.
Now, the thing is that we are in breeding season so you won't really notice any difference in her behavior right now even if you do switch her to a solar schedule and a healthier diet but, come late June or July (if you are lucky, sometimes it takes longer for the endocrine system to get back on track with the seasons because the longer it has been screwed up, the longer it takes to get fixed), she will get better.