Garlic – Good or bad?

Heronbank Cavaliers

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Heronbank Zenith

Heronbank Zenith

Decades ago we started feeding our dogs garlic, for fleas and worms, alongside conventional medications, but on the dog forums recently there have been questions asked about whether garlic is poisonous to dogs.  It seems that it can be harmful but only in large quantities (can a dog eat THAT much garlic?)  My feeling is that they can continue with their Garlic and Liver cake and Garlic sausage in moderation.

…  Anne