Dogs make incredible friends. Their constant companionship can be a source of joy and comfort. However, they are also intelligent animals that can perform tasks very well. If you suffer from a health condition such as diabetes or epilepsy, a service dog can improve your quality of life. Unfortunately, service dogs can be prohibitively expensive, and there may even be a waiting list to obtain one. If you would like a service dog, you also have the option of raising one yourself.