I know damn little about gcc's but I'll answer the questions that apply to parrots in general.
Vicki5280 wrote:1. How do I know how much food (mash, pellets, etc) and how often to feed my birds? Is there a formula anywhere? (They require x number of calories/gram for flighted or nonflighted? Something like that?)
You don't actually know how much to feed and you can't listen to what anyone else tells you (in exact amounts) because each individual bird is different. However, there is a good method of establishing a base line standard (and even this will fluctuate over years and seasons so it must be recalibrated every few months). You will definitely need a gram scale and keep detailed track of the bird's weight. If you have a good memory, you can just become familiar with the weight range. However, if you have multiple birds or a complex situation, then it's good to chart the weights.
There are 3 weights you are really looking for so you may have to weigh the bird 3 times daily for a little while. You want to know the bare minimum empty weight (best time is after it drops it's morning glory), the after meal full weight, and the average weight over time. Most people only focus on the average but I think this one is least important of all. It's more important to know how much your bird's weight naturally ranges from least to most because this also tells you how much food it consumes. However, if you keep water in the bird's cage all the time you could get tricked by water weight rather than food weight. So a few times, leave the water out, weigh the bird before meal, weigh the bird when it lost all interest in food, then give water and weigh again.
For my Cape Parrot this could look something like this.
Morning empty weight: 320g
Post meal weight: 330g
Post water weight: 340g
If I had just weighed him before and after the full deal, I would think he ate 20g of pellets and wouldn't know what role water played. I've noticed that my birds drink about 1g of water for ever 1g of pellets they eat but this can vary. So what I learned is that my Cape eats about 10g of pellets per meal twice a day. If I want a better chance of training him in the afternoon, I may give him 8g of pellets instead. This is more scientific than I actually do it because I can now eyeball how much food to give, but just to give you a sense of how it works.
Of course all of the above presumes a 2 meal a day feeding schedule with no food in between (just water). If the birds eat twice a day, fly, and get exercise, I don't think it is possible for them to get too obese, even if you give unlimited feeding in the morning and evening. However, leaving food in all day can cause trouble.
A safer method of food management I suggest is by time rather than by weight. Give as much food as they want to eat in 30 minutes in two daily meals and that's it. This means they eat what they can/want and no more over eating. I can still train my birds when using this feeding strategy because I simply train them prior to meals and let them make up their caloric balance during the unrestricted meals.
Regardless of method used, you should be able to see the bird maintaining the range you have established during normal feeding. It may take multiple weight measurements to get a real idea of the weight range it goes through.
Vicki5280 wrote:4. How can I keep my flighted GCC from flying up behind me and landing on my shoulder? head? back of my shirt? ponytail? etc.? It's not like I'm abandoning her in the other room, I'm putting her on a tree-stand 12 feet away from me. She just wont stay there. I keep putting her back and she keeps flying to me (unless I'm looking at her with a clicker and a treat
asking her to, then she just sits there with her head cocked and stares at me)

. I hate returning her to her "bedroom"/cage, but that's just what I end up needing to do sometimes.
I shake my birds off if they land on me unwelcome. I only give treats or shoulder time for coming for a recall. I try to provide opportunities to recall when I see they are anxious to come anyway.
Vicki5280 wrote:5. How cold is too cold in the house (in general)? Our house stays pretty cool, and while I'm quite certain Bucky is fine, I sometimes worry about JJ, and now Posei (Lovebird). Our house is old and poorly insulated, and it can get pretty cool during the winter (low 50's at night). Their cages are on an inside wall, not too near the fireplace, away from the window, away from drafts, it's as temperature-stable an area as I can find in my house that's in a populated area. (Our junk-room would probably be more comfortable temperature-wise, but nobody is ever in there.) Since we're coming into spring/summer, it shouldn't be too bad, and I'm hoping that with their fall molt they'll just grow in more down to compensate for the cooler temperature. Is that a reasonable hope?
Prevent drafts and fluctuations of over 10-20 degrees daily and it's fine. Anything over 40, as long as it is consistent, most parrots can deal with. It's the rapid changes in temperature that hurt them. But they're not like mammals. They don't change their insulation seasonally. They just manipulate it to trap more or less air. They can also alter their metabolism to produce more or less heat. When it's a gradual change, they acclimatize (and usually eat more which is why I previously said weight management may need to be readjusted, more food may be necessary to maintain healthy weight).
Miramis wrote:I do not know whether or not linking to another place for training is ok here, if not, feel free to moderate the post obviously.
Would you consider this spam? Do you see any reason for someone else to consider it spam? If you have a strong personal interest in people visiting this site (particularly if it is not related to parrots or the topic) and your sole purpose is to draw people away from the forum and to that site, then it may fall into the category of spam. If it's a genuine effort to participate in the topic and point to a relevant source of helpful parrot information, then it is totally allowed. However, I do prefer people try to talk about what they are linking to a little by summarizing the purpose of the linked page in their own words. Try to add something of your own to the discussion and use the link to back you up. This way we can keep the discussion going even if people don't choose to read the complete article. But sometimes it's a link back to a previous discussion or something with the same outcome that the poster is unaware of, then it's fine.