Toxins definitely can make the liver enzymes go up. Since there are adjuvants in vaccines (particularly killed vaccines like rabies), I would not be at all surprised if vaccines fell into this category. For bile acids, nobody knows the list of things that can make them go up fully (per E's IMS). But that wouldn't be just lepto. I don't see why lepto would be any worse? And I just haven't seen where in general vaccines make enzymes go up. Millions of dogs are vaccined in the US with enzymes WNL. I haven't seen any actual research to say this happens. Or anything to indicate that the lepto vaccine is more toxic to the liver??
Vaccines can and do cause harm. They are processed in chemicals. But there seems to be no evidence that they cause liver damage often.
Drawing blood before vaccinating isn't something I've paid attention to. I am pretty sure not all vets do that though.
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