Birds, reptiles and fish may be more difficult to care for holistically, but that is because they are more difficult to care for anyway.
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So if you have a bit of time this weekend, I would suggest checking out this very comprehensive book on how to help your dog holistically without making your budget stretch more than it is able.
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This presentation outlines a framework for understanding people holistically.
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Yeast infections, particularly reoccurring yeast infections, should be treated holistically.