It is one of the most common diseases of the canary since the environment can play against it. The main symptom of the cold is tiredness. You can tell if your canary sleeps much longer than usual.
Upper respiratory tract infection by moderately pathogenic microorganisms in the environment, followed by reduced organic defenses caused by environmental changes and air currents. It is a mild disease, although not treated over time, the prognosis can be severe if the infection spreads to the deep airways (tracheitis and bronchitis).
Another symptom is slow breathing. The best way to treat this disease is to heat the canary with a not-so-powerful lamp that you will place near your cage. Fresh water helps you recover a lot.
Avoid the cold: Place the canary cage out of range of strong air currents. The cage must be covered at nightfall. The most important thing is to avoid extreme temperature changes at all costs.
Wet discharge from the nostrils; there is slight dyspnoea and tired breathing. There is general despondency, loss of singing and a sad appearance, not too pronounced.
Avoid sudden changes in temperature and air currents.
Sometimes birds recover spontaneously, but in cases where treatment is needed, an appropriate antibiotic (streptomycin) and a vitamin supplement (B6) are effective.