In late winter, it is a good idea to take periodic looks at your woody shrubs and small trees. On a brief foray outside on this icy day, I examined my red-twig dogwood and discovered a broken branch (below). It is probably the result of a squirrel or bird resting on the not-sturdy-enough twig.
I'll need to get this trimmed off soon so that disease does not enter here. At the end of fall, I gave the service berry and Magnolia a once over and found several branches needing removal on the Magnolia. I try to prune as minimally as possible, with clean tools, but in the case of rubbing twigs or damaged bark, it is a necessity.