If you can find Earthgro Groundcover Bark, that was my favorite. After Home Depot stoped carrying it, and OSH closed, I tried two types from Lowes. I didn't like the pine bark mulch, but their Pathway Bark was better and I've been using it for a year now. It sometimes has more heart wood than you'd like and it's as much shredded as chunks, but the only other solution I've found is to buy the larger Bark Nuggets and run them through an electric shredder.
If you have a pickup truck, landscape supply yards usually sell small bark by the yard or half yard, and it's much cheaper. They call it Groundcover bark, pathway bark, or just small bark and I think the size is 1/4" to 1/2" though sometimes larger.