Odd phone call of the day: "why is my cow bellowing?'
Now I'm by no means a cow expert but suggested the two things that occured to me "She's either hungry or she's bulling" (bulling being the term for being in the mood to meet a handsome bull and indulge in a little bovine slap and tickle).
The answer perplexed me "but X (who was apparently raised on a dairy farm) said she wouldn't be bulling while she still had a calf on her"
So cow fact number 1 - a cow in milk can and will come into heat and will fall pregnant again. Not only do our beefy cows prove this every year if this wasn't the way it worked the dairy industry would need twice as many cows.
And I imagine if you didn't already know that you didn't really need to know that (apart from todays caller) and don't care anyway. Too bad, I thought I would tell you whether you needed to know or not. (be aware there may be a surprise test later)