I was roaming around a field, there was a dairy farm and I was checking it's surroundings. There was some whumping behind the fence, but I thought maybe a zombie or two (I had machete that I crafted)

But suddenly the fence goes down.. And 3 zombie cows are there. They are faster than me :(

What is the best thing to do in this situation? I don't want to die just after reaching mettalurgy.