OK boys, I've something fairly substantive to say on this, and I'm fairly learned on the subject, too. The reason being that Father in Law is a large scale dairy farmer, and has one of the largest herds in Somerset. In fact, I'd wager there's half a chance that many of you will actually have his milk (in the form of cheese) in your fridges as you read this. And two years ago, he lost something like 180 pure pedigree beasts unnecessarily in TB screening.
Now, before I start on Cows and Badgers I'd just like to pose this question about vaccination: Why would you want to? For example - the UK is thankfully (and amazingly) Rabies free. Now, there are very effective vaccines against Rabies.....so why don't we just vaccinate every single form of Mammal (Humans included) in the UK, and not bother with border controls etc? Er.... no thanks. So basically, why allow the spread of a disease, simply because you can treat the symptoms. It just doesn't make sense. It's the electricians equivalent of saying it doesn't matter how shoddy the installation is, I put an RCD in.
Now, about Badgers. Yes, they look nice. Well, that's when they haven't got their chops dripping in blood after they've just been down a burrow for a rabbit. Badgers have no natural predators in the wild, they actually require human beings to manage the population. The minute that someone decided all badgers must have leaped off the pages of Wind in the Willows, and must be protected, it was incredibly short sighted and ill-informed. And yes, they carry, and spread, TB. And we know this first hand because F-I-L's herd is a closed herd. There are no inbound cattle movements. And contrary to popular belief, they are not pumped full of drugs and kept crowded and so on. They are very well looked after indeed. They have sanitised stalls when in, filtered treated water...etc. At an engineering level, there is no other possible explanation.
So now we're left with cows, or rather, the means of testing for TB in cows. For reasons best known to themselves, DEFRA (and in fairness I think this is starting to change very very slowly) use a method of testing which has been long abandoned by every other country (Australia was the first) as being completely unreliable. It's a two-stage test - they have a 'skin reactor' which is where they are injected and then a few days later if they are suspect to carrying TB some part of the cows skin becomes inflamed. Apart from the fact that there are hundreds of other things which can cause the same reaction. The other second part of the test can only be done postmortem. That's right.....in order to see if you need to kill the cow in order to stop the spread of TB, you first have to kill the cow. And, there are other, far more reliable, means of testing available, the UK just refuses to use them.
Out of 180 slaughtered prime pedigree dairy cows, guess how many actually had TB? None.
So, if we're talking about the 'unnecessary killing of animals' where do you think we need to start?