Negativity doesn't come in a quantifiable amount that gets shared around. If you overdose it will be adding to the negativity in the world, not protecting other people from experiencing it. And that's the unfortunate power of negativity - it has a compound effect. That's how I see it anyway...
As for the vets, could you go to the vets and speak to them in person rather than over email or phone?
It is easier to write here than in person, I get that. But it won't get you anywhere other than going round in circles. I hope you can speak to crisis today. Nothing worth doing is ever easy.