Jody, I agree with you 100%. I don't know what would cause
someone to do something like that. Perhaps they have a dog
or cat that threatens the birds, or perhaps they think the
birds enjoy being outside. Or, they could just be "jerks"
who bought the birds and now don't want to deal with them.
I don't think it is good for the birds to be out exposed to
the elements with no protection. They are definitely at risk
of disease and predators. Not to mention the stress of being
exposed in a hanging cage. And it is probably only a matter
of time before something (hawk, racoon, etc) gets to them.
Of course, they probably are on a terrible diet with a dirty
cage, no toys or proper perches. (just a guess on my part).
Unfortunately calling the authorities in a case like this
rarely does any good. If I were you, and this is just me, I
would offer to take the birds off their hands, even if it
involves shelling out a small amount of money on your part.
Be nice about it, no insults, just tell them you have seen
the birds out and you would love to have them as company for
your bird (lie and be nice!). If you are able to get them,
then you can decide if they can live with you, or if not,
find them a good home with someone you know can take proper
care of them. Remember to keep them in a different room from
your birds for at least 30 days if you decide to do this.
Good luck and let me know what happens. Fran