Case for diagnosis (Alberta, Canada)

Day #1 this guy helped deliver a breech calf by c-section which was so traumatic that the calf was still-born and then the following day he helped butcher a cow. On Day #3 he noted swelling of his left index finger and by
Day #4 it blew up to look like these pictures. The more I read about orf the more I feel that this is likely the case. The risk factors are there and the time of year and setting is classic. Anyway, what do the viewers think?

(The break in the skin/expelled fluid in the pictures is my doing. There
were no vesicles or absesses and the tissue was tough and non-fluctuent.)

Duncan