Cows In Spaccccceeeeeeeee
http://tygerwhocame2t.blogspot.co.uk/2015/02/the-lunar-strangers.html
Especially given Peter Davison in the role of the Fifth Doctor, one of the captions seems to reinforce his prior role as a vet.
"but no sooner has he resolved to investigate than the base’s leader, Miss Jackson, recruits him to get to the bottom of the cows!"
Icon because I still think "I'll get my coat icon" resembles a vet approaching a cow with a well soaped up arm in this situation.