Pls handle the birds with care...
This is what is called shock moult. Nature designed them to endure such accidents. Thank Lord....!!
The tail feathers will grow back in 3-4 weeks. The new coming feathers will need care. Dont handle the bird until feathers reach their full length and ripe. If the feather gets pluck out when its raw it hurts the bird immensely and will bleed. Infection may occur. And feather will never grow back.
Give the bird calcium twice weekly to help him grow