Sick dogs are prone to want to play and interact like normal, even though they are not well. This is the best way. That's because dogs are creatures of habit. If so, then you know that the most common reaction from the person at the other end of the leash is to pet and soothe and sweet-talk the dog. Another method is to press against the rib cage over the heart while your dog is standing. Embrace these changes and give more love to your dog.
If for some reason your dog's bed area is in a place where it is a little damp or has a draft coming through, then consider adding some sort of heater beside him.
With some dogs, meals aren't the only source of oral intake they have. Sometimes the brightest dogs are also the most stubborn, so keep the faith and know that every dog, no matter how resistant, can be educated. Smaller breeds and puppies usually tend toward faster pulse rates, while larger breeds and healthy dogs who get plenty of exercise often have a slower pulse. And most importantly, become educated in older dog care so that you can provide the best for him. Even the most experienced drivers sometimes make mistakes.
This is especially true while your dog is in bed sleeping.