finches

i am worried about my finches.i have 15 now and i know i have at least 4 females sitting. i am worried because i am building a new bigger aviary but not sure i will have it done in time.they sure can multiply fast. i love listening to them sing. i found out that need more then just seeds.they like veggies and fruits.i chop them up in my food chopper for them .they especially like broccoli,cauliflower and carrots.if u mix a blend of that with boiled eggs that is good for them to feed to the babies.