Fifteen canaries were tested for the possibility of objective intravital diagnostics by smears from the trachea, by transparent tracheoscopy, X-ray examination, and coprological examination. All the results were negative. A positive outcome of the tests is the method of the fixing of the birds for X-ray examination, also applicable for other purposes. Thirty canaries were used for testing the results of therapy by a preparation based on DTHP-Hypocide. Twelve of them were killed before therapy for post-mortal diagnosis, twelve were killed two days, and six were killed nine days from the termination of the therapy. The post-mortem examination of the treated birds demonstrated the effectiveness of the therapy; however, the dosage, application intervals and application sites were found to be unsuitable.