Gouldian thrive on a high-protein, high-fat, high-vitamin supplement or a food source for these, like French Toast in small portions. This should not be in place of your normal diet but as an extra treat.
Soft food too can be fattening. if the birds are molting or breeding they will benefit from extra fat and protein.
It is extremely important that you are birds food should be optimal, and they are receiving everything they need.
No biscuits sold for human consumption are suitable for finches, due to their added sugar, salt and fat. Egg food provides a protein boost when birds need it most - moulting, nesting, or in times of stress. You don't need to feed it at other times, but it's a good treat to have in your repertoire.
Many species, including tree swallows, eat crushed eggshells both for calcium and for use as grit. When you make your breakfast eggs, save the eggshells!
