Three three-month-old Siberian husky x Alaskan malamute crossbreds had suffered episodic inspiratory dyspnoea and stridor for four to eight weeks and their endurance had decreased. In two of them bilateral, and in the other unilateral, laryngeal paralysis was diagnosed by laryngoscopy. In the nucleus ambiguus of the dogs there was a depletion of motor neurons, neuronal degeneration and mild gliosis, but there were no lesions in the root and peripheral segments of the recurrent laryngeal nerves.
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