The nose is important when it comes to Snuffles and other Respiratory Diseases.

Snuffles
Snuffles is like a cold for rabbits. The symptoms are, running nose and sneezing. This shouldn't be confused with the rabbit getting dust or water in its nose, they sneeze like us sometimes. Check the insides of its fronts paws. If the fur is matted together and wet, then it probably has snuffles. They use their paws to wipe their nose. Any rabbit breeder who has snuffles shouldn't try to cure it, because it can get very expensive and snuffles is a disease that spreads quickly and could wipe out a whole barn. If you do decide to treat snuffles, like if this is a pet. Try VetRx. It seems to work the best. But any rabbit who has snuffles if a threat to the whole herd. These rabbits should be culled, and their cage burned to clear away the disease. Water and food supplies should be cleaned or thrown out. If you manage to treat snuffles, there is a high chance of it returning. Snuffles could have life long effects on a rabbit, and most breeders who care for their animals agree, it would be best to put them out of their misery, than to have a life long "cold" that could damage them mentally or even kill them in the long run.

Pneumonia

This is when snuffles goes untreated or treatment isn't successful. Rabbits usually die at this stage. Pneumonia is an inflammation of lung tissue, resulting in reduced oxygen uptake by the blood. It also leads to poor weight gain, and rough coats. Rabbits that have their heads tipped back or show open-mouthed breathing often have it. Living in Florida, where it gets over 100 degrees in the summer, my rabbits often do that, tipping their heads back and breathing heavy, so this shouldn't be confused with pneumonia either. If you make a mistake and give a rabbit medicine, for which he does not need it, they will die.
Prevention agaisnt this and snuffles is cleaning the cages as often as they need it, and not allowing bacteria to form. Clean your cages! And don't allow the rabbit to become wet, or cold. Keep out drafts and try to keep the hutch calm. Stress often leads to many diseases and death.

Scabby Nose
Scabs around the nose and mouth. May or may not have a discharge. This is usually from a severe case of Vent Disease or Hutch burn and is contracted to the nose from the eating of night feces (which is normal) or cleaning. The use of antibiotic cream on the nose and area of hutch burn works the best. Vent disease is to be discussed on another page. This is all caused from poor sanitation.