no no no
sometimes
its not a good idea because the new one will probably get too cose to the egg
to keep the egg warm, and to protect it.
YES!
check
no. it is just like touching an egg
After the parakeet molts and starts looking older it will soon enough lay an egg.
18 days
Yes. But it will not be fertile.
If it is a single parakeet--leave the egg in the cage till it gets cracked.this is suppose to discourage from laying more.
A parakeet and a cockateil cannot have a fertile egg because they have different genetic makeups.