Every Labrador owner knows the baseline: the bowl is emptied in seconds, the floor is checked for casualties, and the dog looks up in genuine hope of a second course. That legendary food drive makes appetite the Labrador's most legible health signal. When a Lab's relationship with food changes, something has changed — the only questions are what, and how fast you need to act.
Refusal: The Loudest Quiet Sign
A Labrador refusing food entirely is never 'just being fussy', because fussiness is not in the breed's repertoire. A full day of refusal in an adult Lab earns a vet visit on its own; refusal plus lethargy, vomiting, diarrhoea, drooling, a hunched posture or obvious discomfort earns it immediately. Watch the bowl approach as much as the bowl: a dog who comes eagerly, sniffs and turns away is often nauseous or in oral pain; a dog who does not even get up is telling a flatter, more worrying story. Puppies compress all the timelines — a Lab puppy who misses consecutive meals and goes quiet should be phoned about the same day, since small bodies run out of reserves quickly.
The Partial Appetite and the Slow Fade
More common than total refusal is the qualified eater: meals finished but slowly, a third left behind, enthusiasm reserved for treats only, or interest that waxes and wanes across the week. This is the pattern owners most often explain away, and in a Labrador it deserves better. Track it in writing for a few days — volume eaten, speed, what else the day contained — and if the pattern persists, book. Causes range from dental pain and low-grade nausea to early illness anywhere in the body, and the common thread is that they are all easier to address at the 'leaving a third of breakfast' stage than at the 'has not eaten in three days' stage. Note too the dog who starts scavenging frantically while going off his actual meals; a Labrador redirecting his drive toward rubbish, grass or stools is often a dog whose digestion feels wrong to him.
Eating More, Gaining or Losing: The Other Direction
Appetite change runs both ways. Weight tells its own story alongside the bowl: rapid gain on genuinely unchanged rations, measured honestly, or steady loss despite a full bowl and a willing eater both belong in an appointment. And keep the breed's famous counterpoint in mind — many Labradors gain weight simply because the household underestimates what 'unchanged rations' includes once treats, chews and children's leftovers are counted, so an honest food diary for a week is a genuinely useful thing to bring.
The Emergency Combinations
Two appetite scenarios in a Labrador bypass all watching and waiting. The first is the scavenger's sequel: a breed that swallows socks, stones, corn cobs and toy fragments may go off food, vomit, strain or drool when something is stuck, and that sequence is an emergency presentation, not a stomach upset to sleep off. The second is appetite loss combined with a tight or swelling belly, unproductive retching, restlessness and distress, which in any deep-chested, big-meal breed means go now. Add collapse, pale gums, laboured breathing or inability to keep water down to any appetite change and the rule is identical: veterinary care first, note-taking in the car park.
Notes That Turn a Worry Into Evidence
Because Labrador appetite is so measurable, your notes can be unusually precise: meals offered, fraction eaten, time taken, treats accepted or refused, water intake impression, stool quality, and a weekly weight or rib-feel. Four or five days of that record lets a vet distinguish a passing upset from a pattern at a glance, and it prevents the commonest failure — the dog who has been 'a bit off his food' for an unknowable number of weeks. Filing those notes with his vaccination history and prior results is what KinsLe's Pet Passport does for your Labrador Retriever, keeping his records in one portable packet so the timeline is always in the room.