These are my sister's dogs. The black and white one on the left is a Border Collie mix she adopted while she lived in Belgium. In this pic, Henry is only about 3 months old, and he's curled up so you can't see much. No use guessing what else he's mixed with. (He's larger now, but still smaller than a BC - only about 45lbs)
However, the one on the right, Patrick, is....? No idea - she tells people "Poundpuppy" when they ask his breed. IMO, his markings are different than a brindle - they look more like stripes. (Does that still qualify as brindle?) His head is super heavy, so our guesses have included pit and some kind of Australian shepherd. She got him from a shelter in Columbus, Ohio and as a puppy looked identical to one of nigguysmom's. He now weighs about 70lbs (he's fat) - the pic next to the puppy makes him look huge, but he only stands about 24" high, I think.