My Dog Has Red Round Sores Some With Flaky Scabs, What Could It Be?

You will only be able to get an exact diagnosis of this problem by visiting your vet and allowing them to examine the problem and undertake additional tests if they think they are necessary. If your dog has had these sores for a prolonged period of time and they are causing him obvious pain or discomfort, then you should try to take him to the vet as soon as you can. It is important that you do this because the chances are that the problem can only be treated by giving your dog medication, which your vet should be able to advise you about.
Mange and ringworm are both common problems that dogs suffer from and could be possible causes of the sores your dog is suffering from. Mange is a persistent contagious skin disease caused by parasitic mites. There are a range of topical treatments available for mange, but it is important that you consult with the vet to ensure that you get the correct one since some types of treatment are known to be dangerous and harmful to certain breeds of dog.
Ringworm is a clinical condition caused by fungal infection of the skin. Again, it can be easily treated through the use of topical medication. Once you have applied medication to your dog's sores, it is advisable to bandage them up to prevent your dog from licking or chewing the wound. This is important because the dog could make the sores worse and could also accidentally consume some of the medication, which could make them ill.

Scabs on my dogs legs

My dog has dry  white flaky skin patches on his belly and chest.

Sounds to me like either mange or ring worm. You won't be able to get rid of either one without the help of a vet. And you do need to take the dog in because if it is either of these conditions and you let it go untreated it can become serious and a hazard to your dogs health.

My dog has red sores all over her legs