They are totally unsuitable for your pet if you want it to live the full twelve or so year lifespan they should enjoy. The occassional carrot, lettuce leaf or other vegetable can also be given, but the great bulk of the diet should be grass , grass , and yet more grass . Ideally, place the rabbit's run on the lawn, where he can select his favourite species of grass. Failing this, take the shears to some grass. If you have been feeding your rabbit a rabbit mix, make the change to grass over a period of about 2 weeks, to allow the gut to adjust to this change.
Most pet rabbits have very weak bones, and are prone to fractures, often for no apparent reason.
It is particularly important always to support the hind limbs when carrying the rabbit around, or it will fracture it's spine quite easily. Exercise will strengthen the bones considerably - a wild rabbit that is always hopping around nibbling grass , will have bones about twice as dense and strong as a rabbit left in it's hutch all the time. A run round on the lawn works wonders. Nail a plank across the inside of the hutch, so the rabbit has to jump over the plank to reach it's food or bed area. Suspend a carrot by a rope from the top of the cage, and invent a few other games to keep your rabbit active.