The benefit of a little garlic is that it helps keep fleas and ticks at bay. I wouldn't feed my fur kids a 1/2 clove a day - even though Dr. Pitcarin recommends it - and I use that book all the time. Check out this stuff:
Grrr-Lick Garlic Snacks for Dogs to Repel Fleas and Ticks
They only recommend a tiny dose for small dogs. I wouldn't give it every day, b/c of the blood issues - but I wouldn't put it on the "Do not feed" list!