What does it mean when dogs have warm dry noses
It probably means the dog has been sitting in the sun and hasn't licked it's nose for awhile. The cold, wet nose thing is a myth. If your dog acts fine, it is fine.
They could be sick. A dog's nose should be cold and wet at all times. Take him/her to a vet.
they might not have been drinking enough it could be sick take him/her to the vet
Try some water.