I've had my two cockatiels for 12 years now, and they's never laid eggs before. We suspected the female was infertile (which was a relief, as our first female died from overlaying)
She's never shown any signs of laying or expecting, even through they both mate like crazy.

Long story short, it all started with running out of supplies of sandpaper for the bottom of their cage. So we used a few sheets of newspaper for the night. By the morning, the couple had shredded EVERYTHING and moved it into the corner.
There, the female was huddled with her tail up against the wall. She'd hiss, sway and be very territorial - which is extremely out of character for her. Over the past two weeks they've kept re-building this 'nest' each time we've removed it and both teils are very irratable when we get too close to the cage. pets question and answers,www.5d2d.com

Neither of them will come out of the cage either, which is not like them.

I've noticed the females poop is huge now, and she tends to struggle when trying to go. This is what scared me at first, because i thought she may have had an egg stuck (my main paranoia)

They both have a varied diet, spoiled with treats and cuttlebones ect. (they're an odd pair though, they do prefer seeds over any sort of fruit :-/)

What i want to know is this;
1 - Are these signs that they'll be expecting eggs?
2 - If they do lay eggs, i've no idea what to do next! I've never experienced chicks and eggs and i wouldn't know where to start. What are the big do's and dont's when breeding (for lack of a more accurate word)

Perfect example of birds about to lay. Large poops, both territorial, shredding, etc. You will just continue doing what you're doing if they lay. They should set (both of them) on the eggs and if so, hatch, of course. You can handle the babies every day to make them really tame and can even help out by hand feeding some once in a while if you want. Just make sure the parents always have plenty of food and water and you're set.

parrot breeder

Taking care of eggs differs from owner to breeder to owner. If you want to hand raise them, then you have to buy special commercial formulas. I would say that you wouldn't want to do that, since the parents feed them every three to four hours. You can just let the parents do the regurgitating ;)

If you want to incubate them yourself, then you need to buy an incubator and keep them well under 65 degrees Fahrenheit for a couple of weeks, turning them at least 5 times every day. The parents turn them over 17 times, so I would recommend you leave it to them.

You can handle the chicks after they don't need food from their mother or father anymore.

Please get a breeding box!!

These boxes are ideal for breeding birds. Just put a layer of pine shavings at the bottom and clean the box after the chicks are laid an weaned. You can even get a disposable one.

If you see that you're cockatiel becomes egg-bound (which comes with undernourishment or sickness), put her in a bin of warm water. If she doesn't lay then, take her to the vet, because she can die!

Remember that the hens lay over a period of days, so make sure you don't kick your cockatiel out before she's done! To see if the eggs are fertile, put them up to the light. It there's a little red streak, expect babies soon!

pets question and answers,www.5d2d.com

You should also read a book on cockatiels. They usually have lots more information on breeding, and there are books are specifically for breeding cockatiels. You could also ask an experienced breeder.

Good lucj!

Online/book research.