How Big Will My Old English Sheepdog Get

If you are looking at a shaggy grey and white puppy with paws like saucers and wondering how much dog is hiding under all that hair, you are asking the right question at the right time. The Old English Sheepdog is a large, powerfully built drover breed, and the way you support the first two years shapes the sound, comfortable adult your puppy becomes. This guide gives you a clear month by month weight picture, an honest timeline for when growth finishes, and the daily habits that help a big shaggy puppy grow into a strong, easy moving companion.

How big will my Old English Sheepdog get?

A fully grown male Old English Sheepdog usually weighs 70 to 100 pounds and stands 22 inches or more at the shoulder. Females usually weigh 60 to 85 pounds and stand 21 inches or more. The breed standard sets a minimum height rather than a maximum, so a well grown male often measures 23 or 24 inches and carries real substance across the back and loin. Most of that height arrives by 12 to 14 months, and the body keeps thickening until somewhere between 20 and 24 months.

Genetics, sex, line and nutrition all shape where an individual lands, so treat these ranges as a dependable guide rather than a fixed rule. And remember the coat. A profusely coated adult can look 20 pounds heavier than the dog underneath, which is exactly why hands on the ribs beat a glance across the room every single time.

What makes an Old English Sheepdog grow the way it does

The Old English Sheepdog was built to drive cattle and sheep to market over long distances, and the body reflects that job. This is a compact, square, muscular dog with a broad rump that actually stands higher than the shoulder, a deep capacious chest and that famous rolling, bear like amble. It is heavy boned without being a giant, so it grows into substance rather than height.

A young Sheepdog often looks awkward through the middle of the first year. The legs arrive before the chest does, the puppy coat is still soft and thin compared to the adult double coat, and the outline looks nothing like the rounded, hay bale silhouette of a mature dog. That is completely normal. The breed comes together slowly, and the coat that defines it keeps changing texture and volume well into the second year. Because the frame carries real weight on a fairly short leg, steady growth through the first eighteen months is one of the kindest things you can give this breed.

Old English Sheepdog growth chart, month by month

Use this chart as a friendly guide, not a report card. A shaggy puppy who tracks a little above or below these numbers while feeling lean under the coat is usually doing just fine.

How Big Will My Old English Sheepdog Get: reference table

Age	Male weight	Female weight
2 months	18 to 24 lb	15 to 22 lb
3 months	28 to 36 lb	25 to 32 lb
4 months	38 to 48 lb	33 to 42 lb
6 months	52 to 66 lb	46 to 58 lb
9 months	62 to 80 lb	55 to 70 lb
12 months	68 to 90 lb	58 to 78 lb
18 months	70 to 97 lb	60 to 83 lb
2 years plus	70 to 100 lb	60 to 85 lb

Weigh at the same time of day, ideally before a meal, and write the number down. A monthly note tells you far more than a single reading ever will, because what you are watching for is the shape of the curve rather than any one figure on it.

When do Old English Sheepdogs stop growing?

Old English Sheepdogs reach most of their adult height by around 12 to 14 months. After that the change is all about substance. Your Sheepdog broadens through the chest, deepens through the ribs and gains the muscle that gives the breed its rolling, powerful gait, usually until 20 to 24 months of age. So a tall, narrow fourteen month old who still looks adolescent under all that hair is right on schedule.

As a rough guide, dogs with an expected adult weight of 80 to 100 pounds keep developing for roughly 20 to 24 months. Because the frame is largely set in the first year and a half, that window is your prime time to build strong habits around food, movement and joint support.

Why the growth window matters for a heavy coated drover

During this window your Sheepdog is building the cartilage, bone and connective tissue that will carry a stocky adult body for the next decade. Growth plates, the soft areas at the ends of the long bones, stay open through much of the first year. While they are open, hard impact and excess weight ask more of a frame that is still forming. That matters doubly here, because a heavy bodied dog on a moderate length leg loads its joints more than a leggy athlete does at the same weight.

The coat adds a second complication that lighter breeds never face. A dense double coat traps heat, so a young Sheepdog can overheat long before it looks tired, and a hot puppy that pushes on is a puppy moving with poor coordination. Keep summer sessions short, early and shaded, and let the dog stop before it wants to.

How much should an Old English Sheepdog eat while growing?

Large breed puppies do best with steady, moderate growth rather than fast growth. An even curve supports comfortable movement now and for years to come. A few practical habits make a real difference:

• Choose a complete food formulated for large breed puppies, which balances calories, calcium and phosphorus for slower, steadier growth.
• Split the daily amount into three meals while young, then two meals as an adult, to keep energy even across the day.
• Feed to a lean body condition. You should feel the ribs easily under a light layer of covering. If you have to hunt for them through the coat, ease back on portions.
• Count the treats. Training rewards, chews and table scraps add up quickly on a breed this food motivated, and they are the most common reason a lean feeding plan quietly stops working.
• Keep fresh water available at all times, especially in warm weather, because a heavy coated dog loses more to panting than you expect.
• Ask your veterinarian to confirm the right daily amount at each checkup, since the correct portion changes quickly during the first year.

How to check body condition in ten seconds

The scale tells you weight, but body condition tells you health. On a coated breed this check is not optional, it is the only honest reading you have.

• Ribs. Push your fingers through the coat and run them along the sides. You should feel each rib easily under a thin layer. If you have to press hard, ease back on food.
• Waist. Place both hands on the loin and feel for the narrowing behind the ribs. Looking from above tells you about the coat, not the dog.
• Tuck. Run a flat hand along the belly from front to back. It should rise toward the back legs rather than hanging level.

Check every couple of weeks through the growth years and adjust portions gently with your veterinarian’s guidance. Grooming time is the natural moment for it, since your hands are already on the dog.

Growth safe exercise for an Old English Sheepdog puppy

Sheepdogs are athletic, playful and genuinely energetic, but during the fast growth months the goal is regular, moderate activity rather than repeated hard impact. This is a herding brain in a sturdy body, so it tires as much from thinking as from running.

• Favor free play, exploring and short walks on grass or soft ground over pavement pounding.
• Keep long runs, hard sprints and repeated jumping moderate while the growth plates are still open.
• Add early training, scent games and puzzle work, which satisfy a herding mind without loading young joints.
• Teach slow, controlled stairs and a helping hand into the car rather than letting a heavy puppy leap down onto hard ground.
• Let your puppy rest fully between bursts of activity, and end sessions while there is still energy left in the tank.

Protecting a heavy bodied dog’s joints

An Old English Sheepdog carries real substance on a moderate length leg, and every stride, turn and play bow travels through the joints. Supporting healthy joint development while your Sheepdog is still building that frame is a simple, caring habit that pays off across a long shaggy lifetime.

Alongside lean feeding and sensible exercise, many big dog parents add a daily joint support chew made for large and giant breeds. MoveGuard Growth is built for exactly this stage. It combines nine actives, including 250mg New Zealand Green Lipped Mussel, 400mg glucosamine, 300mg chondroitin, 250mg MSM and 15mg hyaluronic acid, to support the developing joints of young large breed dogs across the roughly 8 to 30 month growth window. You dose by expected adult weight, so most Sheepdogs sit at two chews a day, with bigger males at three. It ships as 90 chicken liver flavour chews, is made in the USA in an NSF facility, and is backed by a 60 day guarantee.

Signs your Old English Sheepdog is growing on track

You do not need a daily scale reading to know things are going well. Look for a bright, boisterous puppy with ribs you can feel under light pressure, a waist you can find with your hands, a smooth rolling gait with no bunny hopping, and a healthy appetite. Even, unhurried growth with good muscle over the hindquarters is exactly what you want to see.

If you ever notice limping, stiffness after rest, reluctance to climb stairs, a sudden change in how your puppy sits, or growth that seems to accelerate sharply, a quick chat with your veterinarian brings peace of mind and lets you adjust food or activity early. Early beats late every time with a growing large breed.

A simple growth game plan, stage by stage

You do not need a complicated program to raise a sound Sheepdog. You need the right emphasis at the right time.

8 weeks to 4 months. Foundation stage. Focus on a complete large breed puppy food, three calm meals a day, broad socialisation, and short bursts of free play on soft ground. Start grooming now, in tiny happy sessions, so a 90 pound adult is comfortable being handled all over. That handling doubles as your earliest body condition check.

4 to 8 months. Growth is quick and your puppy may look leggy and unfinished. Keep feeding lean, keep exercise moderate, and build steady habits around stairs and car entry. This is a natural point to begin a daily joint support routine that carries through the whole growth window. The coat begins its change, so grooming time increases here.

8 to 18 months. Height nears its peak while the body starts to broaden. Match portions to a lean body condition, since an adolescent appetite can easily outpace need. Add structured activity and training gradually, always favouring grass over concrete, and watch the heat as the adult coat comes in properly.

18 months to 3 years. The gangly adolescent becomes a powerful, rolling adult. Growth slows while chest and muscle continue to fill. Build activity up as your veterinarian advises, keep the weight honest now that the coat can hide a great deal, and many parents keep a joint support routine going into adulthood.

Common growth mistakes to avoid

Most growth problems in large breeds come from a few avoidable habits. Steer clear of these and you are already ahead.

• Judging condition by eye. On this breed the coat is a disguise. A dog can gain ten pounds without looking any different at all, so hands beat eyes.
• Overfeeding for size. A heavy young Sheepdog is not a healthier one. Extra weight loads developing joints. Feed lean and let the size arrive on its own timeline.
• Skipping large breed puppy food. These formulas control calcium and calories for steady growth. Confirm the right food with your veterinarian.
• Too much hard exercise, too young. Long runs, agility and repeated jumping on hard ground are a lot to ask of open growth plates on a heavy framed puppy.
• Neglecting the coat. A matted coat hurts, hides skin problems and makes a dog reluctant to be handled, which quietly ends your body condition checks.
• Waiting for a problem before supporting joints. The growth window is the ideal time to support developing joints, not after signs appear.

The Old English Sheepdog temperament and the growth years

An Old English Sheepdog is as much a personality as a body, and the two grow together. This is a famously good natured, clownish, affectionate breed with a deep bond to its family and a herding instinct that has never entirely gone away. Young Sheepdogs often try to gather children, other dogs and occasionally guests, usually with a shoulder nudge rather than anything sharper, and that instinct wants shaping early rather than scolding later.

Short, positive training sessions tire a young Sheepdog as much as a walk, and they build the manners a dog this size genuinely needs. Puzzle feeders, scent games and gentle obedience work give a busy mind an outlet that does not pound on growing joints. Socialisation matters just as much, because a confident, well handled Sheepdog carries that steadiness into a large adulthood where strangers, vets and groomers all need to be able to put hands on the dog. Build the mind, the manners and the frame together and you end up with the cheerful, devoted shadow the breed is loved for.

Frequently asked questions

The bottom line

Your Old English Sheepdog will most likely mature into a 60 to 100 pound drover who reaches adult height by around 12 to 14 months and finishes filling out by 20 to 24 months. Feed for lean, steady growth, check condition with your hands rather than your eyes, keep exercise sensible while those joints develop, watch the heat under all that coat, and give that herding mind plenty to do. That is how you raise a strong, comfortable Sheepdog who rolls through life with the easy good humour the breed is famous for.

Want the simple roadmap in one place? Grab our free Big Dog Growth Guide for the growth window checklist, feeding framework and joint safe exercise limits, all written for large and giant breeds.

This article is for general educational purposes only and is not veterinary advice. It is not intended to diagnose, treat, cure or prevent any disease. Always consult your veterinarian about your dog’s individual health, nutrition and supplement needs. These statements have not been evaluated by the Food and Drug Administration.