White doves

Hi, I’m looking for some advice please. We seem to have gained four white doves roosting on our bedroom windowsill every night (started with one, then two, then four!). I think they’re absolutely beautiful but I’m worried about two of them being open to the elements, as they are not protected from the weather. Will they be ok?! I’m unsure about buying a dovecote incase they don’t use it. Basically my question is do I leave them to it as this is normal behaviour or do I need to do something?

Many thanks, Janette