Experimental pneumonia in lambs could be reproduced by M. mycoides ssp mycoides (LC) and P. hemolytica concurrent infection. High rise in temperature, nasal and ocular discharge, dullness, depression, coughing, sneezing, laboured breathing, arching of back, exhaustion, loss of muscular and eye reflexes, submandibular edema and blood tinged nasal discharge in terminal stages of disease were the manifestation. Hb, PCV and TEC values were in normal range. A significant neutrophilia alongwith lymphocytopenia upto 10 DPI was also observed.