It is the most God-awful bitter tasting stuff you will ever encounter, if you somehow get it in your mouth. Better yet, two or three plastic bags would be better. Dry bloodmeal sprinkled in a thin band around plants or garden beds seems to work pretty well, but it has to be reapplied every few weeks and after rain. Some dogs will lap up bloodmeal as if you put it down just for them. Bloodmeal adds nitrogen to the soil that can be advantageous during most of the year, but it can stimulate unwanted growth when used in late summer and fall just before frost occurs.
Dogs also keep deer away.
At least that's what I hear from gardeners who have big dogs that are given free rein to run around the property. A toothless bark from a non-mobile dog will not frighten deer for very long, since deer soon catch on that there is no real threat. Some gardeners have gone to great lengths to obtain wild animal manure and urine from zoos and wildlife preserves. Coyote urine is actually bottled for sale for this purpose. Plopped and dribbled strategically around the garden, reports are that it does not faze deer for very long.