A gentle giant whose appetite usually matches his size
Maine Coons mature slowly and eat like it, working through generous portions with an easy, doglike enthusiasm. When a cat built on that scale turns away from the bowl, owners are right to pay attention. A single quiet day can be nothing more than an unsettled stomach, yet the combination of a very long coat, a large frame, and a tendency to hide discomfort means the common causes deserve a methodical look.
The Maine Coon causes to check first
Hairballs lead the list. That magnificent double coat sheds into his stomach every time he grooms, and during heavy shedding a formed hairball can leave him nauseous, retching, and uninterested in food until it passes one way or the other. Dental trouble is close behind: large cats are not exempt from gum disease or a resorbing tooth, and a Coon who approaches eagerly, then drops kibble or chews on one side, is often telling you his mouth hurts. Look also at his grooming itself, because a Coon who stops maintaining his coat, leaving mats under the arms and along the trousers, may be stiff, sore, or simply feeling too unwell to bother. Nausea from eating too fast, a mild stomach upset, or constipation can each take a day's appetite, and in a big, laid-back cat these are easy to miss under all that fur and good nature.
Hands-on checks suited to a large cat
Run your palms over his ribs, spine, and hips; on a Maine Coon, condition hides under coat, and your hands will catch weight loss your eyes miss. Part the fur and check the skin along his back for irritation that might make grooming painful. Watch him eat a single piece of kibble and note any head tilt, dropping, or one-sided chewing. Check the litter tray for small, dry stools suggesting constipation, and think back over the last few days for retching episodes, grass eating, or a grooming session that ended in coughing.
Helping him through a quiet day
Serve his normal food warmed slightly, in a wide, shallow dish raised off the floor so his big frame and whiskers are comfortable. Brush him gently if he enjoys it, removing loose coat before his tongue does, and make sure water is available in more than one spot, since a nauseous big cat may drink at a fountain but ignore a bowl. Keep meals calm and unhurried; a slow-feeder bowl can help a Coon who bolts food and then regrets it. Do not respond to one missed day by offering a parade of rich alternatives, which muddies the picture if he needs the vet tomorrow.
When a big cat needs the vet promptly
Seek veterinary help if he eats nothing into a second day, retches repeatedly without producing a hairball, drools, shows a sore mouth, passes no stool, or becomes lethargic and withdrawn. Large cats who stop eating entirely are at real risk of secondary liver strain, so the threshold for calling is lower than owners expect. A KinsLe Pet Passport holding his weight trend, dental history, and notes on shedding and appetite gives the vet that full picture in one packet instead of a scramble of half-remembered dates.