Below is just one way a groomer tends to an Old English Sheepdog's coat.  Dogs often need to be slowly desensitized to any new process.  This process can be more challenging to some owners. The vibration of electric clippers can startle a dog so you need to be slowly desensitize a dog to this process.  You need to proceed slowly, respect the dog's limits, praise and reward lavishly so the dog will learn to tolerate it.  Only you know your dog and how he or she may respond.  Seek assistance from a professional if there is any chance your dog could be harmed by it's exuberance or fear or if the dog could display an aggressive behavior. Follow all product safety instructions provided by individual manufacturers.  Use great care when using scissors so you don't accidentally cut or poke the dog. Try to make grooming a special one-on-one time that both you and your dog will look forward to.   These instructions are offered as-is and without guarantee or warranty.