Growth is the one baby-bird question you cannot answer by eye. A chick can look round and bright while quietly losing ground, so a short daily weighing routine, done the same way at the same time, is the record that protects it. The technique is simple; the consistency is what makes the numbers mean something.
Choosing and preparing the scale
Pick a digital kitchen scale that reads in single grams and responds quickly, because baby birds are light and restless and a slow scale chases a moving target. Cover the platform with a folded paper towel so tiny feet grip instead of skidding, and let the chick stand on it during hand-feeding play for a day or two before you care about readings, so the scale becomes furniture rather than an event. For very young or wobbly chicks that cannot stand steadily, weigh them inside a small ventilated box or tub lined with towel, then weigh the empty container and subtract it; write both figures down so anyone repeating the job gets the same result.
Timing the weigh-in so days compare fairly
A baby bird's weight swings through the day with every feed, so pick one anchor point and keep it: morning, after the first big dropping, before the first feed, with the crop empty. That empty-crop reading is the figure that compares honestly across days. Record it the same way each time, in grams, alongside quick notes on appetite, droppings and any new food or skill, because a dip beside a note about a refused evening feed reads very differently from a dip with no explanation. Weigh daily through weaning and fledging, then a few times a week once growth levels out and adult weight is the thing you are guarding.
Handling a chick that will not sit still
Expect protest at first. Work in a warm, quiet room, cup the chick gently against your palm on the walk to the scale, and set it down with your hand shading it for a second so it settles instead of fluttering. Morning chicks fresh from sleep are usually calmer than chicks mid-play. If a reading bounces, wait for the still moment rather than averaging guesses, and if the chick panics, stop and try again a little later; a stressful weigh-in that teaches fear of handling costs more than one missed day. Never weigh a chick straight after a feed to calm it, because that full-crop figure will poison the record you are trying to keep clean.
Reading the growth record and knowing when to act
Plot or list the morning figures and look at the direction across three or four days. Steady gain in a growing chick, or a level line in one close to adult size, is reassuring. A plateau during weaning deserves closer watching and fuller feeds; a downward run, a chick whose keel feels sharper, or weight loss paired with quiet behaviour means contacting an avian vet promptly and taking the record with you, since the trend you wrote down is exactly what the vet needs first. Storing the whole weight history in KinsLe inside Pet Passport keeps that growth story in one portable packet, ready to show at appointments or hand to a new caregiver without rebuilding it from memory.