I haven't seen much on cat or other animal Herxheimer Reactions.
And it's difficult because they can't tell you what they're feeling.
And if they are ill and or not feeling well, then it is harder to figure out.
Which is why "Low and Slow" is particularly important for them.
The only one I can think of is if they vomit, but if you are close to using
the suggested dosage and protocol, that should probably never happen.
If they seem to be feeling worse, then MAYBE you are "overdosing them".
I never had that problem with my cat.
But if you are following Jim Humbles "Animal Protocol" based on weight,
you shouldn't generally or usually have a problem.
You could try explaining exactly what you are doing IN DETAIL and
then we could look at it and probably figure out if you are doing it right.
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