GARLIC for Dogs to Treat Worms?

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Symptoms: Increase hunger, weight- loss, itching & rubbing bum... All signs of worms, correct? Noni fits the description to a 't'.
I was about to book a 'fecal float' with my vet and get him dewormed when my boyfriend suggested garlic.

My DB's parents give their dog a whole raw garlic clove every day since she was a puppy. She's 14 now, and has never had any health problems.

I looked it up online and surprisingly a lot of people feed their dogs raw garlic when they suspect their dog has worms or fleas.

But I've always though garlic toxic for dogs.