The dove that looks calm may be the stressed one
Doves are soft-voiced, ground-leaning birds whose first defence is to freeze and hope the danger passes. On fireworks night that means the dove sitting motionless in the corner, not cooing, not feeding and not reacting when you approach, is very likely frightened rather than serene. Owners used to parrots can misread this completely, because the noisy bird gets help while the silent dove gets praised for coping. Judge your dove by what it has stopped doing: normal evenings include gentle cooing, short walks about the cage floor, pecking at seed and a relaxed, rounded posture with the head drawn comfortably in.
A low, dim and familiar setup
Leave the cage where it normally stands if the room can be darkened, since doves are homebodies and a familiar layout matters more to them than an extra wall between them and the noise. Draw curtains to remove the flashes, dim the lights to a steady low level rather than switching them off, and add soft, continuous background sound at low volume. Keep the dove's favourite low perch or shelf in place and clear the floor space it likes to walk, removing loose toys that a sudden flutter could send it colliding with.
Unlike high-perching parrots, a startled dove tends to burst upwards once and then drop to the ground, so a clear floor and no open water dish deep enough to land in make the cage safer for that single panicked flight. Covering part of the cage gives a visual barrier to hide behind, which suits a bird whose instinct is concealment.
Handling, company and other animals
Fireworks night is not the night to lift a dove out for comfort. Being caught and held is, to a dove, close to what a predator does, and a bird that struggles free indoors can batter itself against windows in the dark. Sit nearby instead, move slowly when you pass the cage and speak in the low tones your dove hears from you every day. A bonded pair should stay together; separating doves for the night removes the single most calming presence in the cage.
Keep dogs and cats out of the room without exception. A dove can cope with distant bangs far better than with bangs plus a watching predator silhouette, and the combination is what produces the blind upward burst that injures birds.
Doors and aviary checks before dark
Whether your dove lives in an indoor cage or an outdoor aviary, walk the fastenings before dusk. Aviary doors, feeding hatches and any pop-hole should be shut and latched, and indoor cage doors checked with a tug. Tell everyone at home that the dove's room stays closed for the evening, because a dove that slips out during fireworks will usually fly a short distance and then sit tight in the dark, where it is vulnerable and hard to spot until morning.
Reading the morning after
A dove that coped will coo, feed and walk its floor as usual by morning. Warning signs are a dove still pressed flat and silent, seed untouched, droppings scant, or one wing held fractionally lower than the other after a night-time collision. Feather damage around the head, from flying into bars, also deserves attention. A dove showing any of these after a quiet night to recover should be discussed with an avian vet rather than watched for another day, because doves hide decline until it is advanced.
Because a lost dove sits quietly rather than calling attention to itself, extra local eyes matter greatly if one ever escapes, and KinsLe's Lost Pet Alert System sends a free alert to nearby members while letting a finder message you directly the moment your dove is spotted.