BellaOnline Forums Hobbies and Crafts Birding starting my aviary again can any 1 help?

hi all i nedd some help, sadly last year my stock of finches in my outdoor aviary died, i lost all 26 zebra finches within 2/3 weeks 5 of them albino finch chicks. when we ask the vet what was wrong any sign of diseses diet problem he said nothing was wrong it was just the cold.
so im going to start again this year about late april early may, so my dad said he is going to to put some heating in the aviary for me. but im not sure if it will harm my finches.
is this a good idea and does any1 no any ideas wich will prevent my birds from dieing in the cold mounths? i need some advice please help.
thanks alot michael <img src="/images/graemlins/frown.gif" alt="" />

Actually this is the birding forum, about wild birds <img src="/images/graemlins/smile.gif" alt="" /> I think you want the pet birds forum which is here -

http://www.bellaonline.com/forum/ultimatebb.cgi?ubb=forum;f=13

good luck!