Hi Rosie is so very lucky to have you as her owner now. It sounds like Rosie is very happy. Hens are quite vocal too. Its just awful how some canaries are kept..sickening. How long have you had her? As her start in life wasnt acceptable she needs all the added things she can get..like the vitamins...they will replace everything that was missing in her start in life. I use bee pollen as a sprinkle acouple of times a week. Its an immune booster. I get the powdered as mine pick around the granules. Again fabfinches is useful for these. I use cut apple tree branches in my aviary. The different widths of branch are good for their feet. If their feet are tired. .especially the older birds they go for the fat branches to rest them. A brilliant idea from @finchly on how to get it to fix in place in a cage. I will be doing that myself for my inside flight cages. I have the standard dowel perches at the moment.