THEY ARE NOT A BREED FOR AN APARTMENT!
My major concerns would be:
Unstable temperaments. Unless carefully bred by people who know how to produce good-tempered dogs, Old English Sheepdogs are quite susceptible to genetically bad temperaments. Obedience instructors and behavioral consultants see LOTS of Old English Sheepdogs with neurotic behaviors, including biting, sharpness, extreme fearfulness, hyperactivity, and general nastiness.
Providing enough exercise and mental stimulation. Old English Sheepdogs MUST have regular opportunities to vent their energy and do interesting things. Otherwise they will become rambunctious and bored -- which they usually express by destructive chewing. Bored Old English Sheepdogs can make a shambles of your house and yard.
If you simply want a pet for your family, and don't have the time or inclination to take your dog out for frequent long romps, or to get involved in some canine activity such as advanced obedience, or tracking, or agility, I do not recommend this breed.
Separation anxiety. More than most other breeds, Old English Sheepdogs need a great deal of companionship and do not like being left alone for more than a few hours. They tend to express their unhappiness through destructive chewing and barking. If you work all day, this is not the breed for you.
If you have small children, or if you or anyone who lives with you is elderly or infirm, I do not recommend Old English Sheepdog puppies. Young Old English (up to about two years old) romp and jump with great vigor, and things can go flying, including people. The temptation to play roughly and nip at moving people is simply too strong in many young Old English Sheepdogs.
Stubbornness. Old English Sheepdogs are not Golden Retrievers. They can be very stubborn and manipulative. You must show them, through absolute consistency, that you mean what you say.
Grooming. Without frequent brushing and combing, Old English Sheepdogs become a matted mess. If you can't commit to the brushing, you have to commit to frequent trimming to keep the coat short, neat, and healthy.
Shedding. Old English Sheepdogs she a LOT. You'll find hair and fur all over your clothing, upholstery, carpeting, under your furniture, on your countertops -- even in your food. Frequent vacuuming will become a way of life.
"Shaggy dog syndrome." Like all shaggy dogs, the Old English Sheepdog is a messy dog. Leaves, mud, snow, fecal matter, and other debris cling to his rough coat and ends up all over your house. When he drinks, his beard absorbs water, which drips on your floors when he walks away. When he eats, his beard absorbs food so that when he sniffs your face or presses his head against your leg, YOU end up dirty, too. Big shaggy dogs are not suited to fastidious housekeepers.
Slobbering. Some Old English Sheepdogs tend to slobber or drool, especially after eating and drinking.
Gassiness (flatulence) that can send you running for cover. Fortunately, Old English Sheepdogs who are fed a natural diet of real meat and other fresh foods have much less trouble with gassiness. See my Old English Sheepdog Health Page for more information.
Health problems. From joint problems to eye problems to skin problems to neurological disease, Old English Sheepdogs can be risky in the health department.
The Old English Sheepdog does not adapt to confinement and needs lots of human attention. Neglect will negatively affect his temperament. Take the Bobtail to frequent walks or playing with him in a fenced yard will keep him happy, and will return that which is given to him many times over.
Living Conditions
The dogs do well under almost any climatic conditions, their coats serving as insulation against heat, cold, and dampness. The Old English generally has a happy, rough and tumble disposition; he is always ready for action. He makes an ideal house pet not usually given to roaming. If your preference is for an outdoor dog to be left pretty much to fend for itself, this is not the breed for you. The OES is a hardy, intelligent herding dog, which prefers to spend his time with his family