Hello morining
Yes.
Erm, I wouldn't recommend it...
A budgie and a parakeet are the same thing.
No you can't the Alexander parakeet.
YES, but only after the American parakeet beats the English parakeet in a revolution.
Yes
Yes you can. I have done that.
maybe not . . .I think
They luv eachutha!
Unless the birds were raised together you will have a dead parakeet or parrolett. Parroletts are VERY VERY territorial and unless raised together the parrolett will try to chase off or kill your parakeet.
since no one has answered you... I thought I would let you know my rat killed and ate my two gerbils. I let her out for a while and she found a way into the gerbil cage and she attacked them. ick. Another rat I had killed it's cage mate (rat).
If there are two or more in the same cage, one of the other birds is pulling them out.