finch bird and eggs. help!?

i have some finches two females and one male. i was cleaning the cage today and i notice some eggs, they were in the botton of the cage. i didnt know they were ready to lay eggs so i didint put a nest house. one of the eggs was craked open and the other three didnt look good either. so now how do i know which of the female birds lay the eggs and how long will they take to lay more eggs. and please any other advice and thing i would need to know tell me. thanks a lot.
Answers:
If you want babies, just put a small straw or grass nest (you can buy finch nests at most pet stores) in the cage near the top. The mated pair will take care of the rest. Make sure your cage is large enough that they can have their space. Breeding finches require quite a bit of space. My recommendation would be a cage at least 3 feet long X 1 1/2 - 2 feet deep X 2 - 3 feet tall. Once she starts laying the female will often continue laying until she has 3-4 eggs in her nest. Meaning, if you take them out, she will keep laying more. Also, make sure they have an ample supply of cuttle bone or calcium supplement.

---

keep the eggs in. if they dont bother with them, or intentionaly damage them, clean them up. buy some nesting material for them rihgt away k? 鈾ope this helps鈾?

---

Each bird has their season to laying their eggs.U can look it up on the computer. The way u can tell that they want to lay eggs is by them feeding each other,trying to shred things up,guts very wild like wont let u touch it.the first time they lay eggs they will probably die.Y? because they don't kno how to take care of them.they will get the experience later on. don't touch the eggs when u get some.I hope I helped.