Walking back to home with 5 to 6 cows following with wheat in hand

Walking back to home with 5 to 6 cows following with wheat in hand

What I expected to happen was...:
Just was walking slowly back to where I was keeping a pen for the cows that I was collecting when the crash occurred. Unsure of the direct cause.

Crash Report attached.

(Why is Minecraft 1.7.4 not available on "Affects Version/s"?)