I Googled "Why does Otis have udders in barnyard?" and got
About 52,100 results
has no gif animations of this mysterious man cow with udders!
Google Answers has a list of links that summarizes that the creator Steve Oedekerk said that Udders were funny.
Searching for Udder pics led me to this headline:
I Googled and Snoped this!
Genetically Modified Cows Produce "Human" Milk
Yep and it is OLD NEWS from 2011!
I Googled " Is it true that there are cows genetically modified to produce human milk?"
I got about 1,010,000 results (0.59 seconds)
Story from THE TELEGRAPH [HERE]
Story from FOX NEWS [HERE]