be careful with the vet RX as it contains camphor...a runny nose is also symptomatic with vit A deficiency... don't underestimate this ...if left unaddressed it can be the death of your bird:
http://compepid.tuskegee.edu/syllabi/pathobiology/pathology/avianmed/chapter6.html
6.1 Vitamin A deficiency.
a. Synonyms:
Nutritional group.
b. Function of Vitamin A:
Vitamin A is essential in poultry rations, not only for growth but for optimum vision and for maintaining the integrity of the mucous membrane.
c., Vitamin A requirements of poultry.
1200-1600 I.U. perpound of ration for laying and breeding hens. No higher than 600 I.U. for starting chicks.
d. Symptoms of deficiency:
1. Adult chickens.
1. When adult chickens are placed on a diet severely deficient in vitamin A. symptom usually develop within 2-5 months, the length of time depending upon the amount of Vitamin A stored in the liver and other tissues of the body.
2 . Emaciation and weak, feather ruffled.
3. Drop in egg production, decrease in hatchability, increase in embryonic malpositions and mortality in eggs from affected birds.
4. Watery discharge from the nostrils and eyes, eyelids are often stuck together.
5. In late stage, milky white, caseous material forms in the eyes.
2. Chicks.
1. Age: 3 weeks and over
2. Action: Chronic
3. Cessation of growth, drowsiness, weakness, incoordination, emaciation and ruffled feathers.
4. Inflamed watery eye or caseous eyes.
5. Nostril discharge
6. Soil feathers
7. Pale beak and legs.
e Lesions:
1. Adult chickens.
1. Nodules. Lesions first appear in the upper alimentary tract and are largely confined to the mucous glands and thin ducts. The original epithelium becomes replaced by a stratified squamous keratinizing epithelium which blocks the ducts of the mucous gland causing them to become distended with secretions and necrotic materials.
2. Small, white pustles are found in the nasal passage, mouth, esophagus, pharynx and may extend into the crop.
3. Lesions become larger and are raised above the surface of the mucous membrane and show a depression in the center.
2. Chicks:
1. Lesions in the mucous membranes of the head, esophagus, crops, and respiratory tract.
2. The kidneys become pale and show a network of fine white lines (renal tubules filled with urates). Deposits of urates have been found on the heart, pericardium, liver and spleen of affected birds due to kidney injury.
3. Enlarged gall bladder.
3. Histopathology:
1 Atrophy of the cytoplasm and loss of cilia in columnar ciliated epithelium of the respiratory tract.
2. Respiratory epithelium transformed into stratified squamous keratinized epithelium.
f. Diagnosis:
Differential diagnosis.
(see link for handy chart to differentiate from respiratory illnesses)