My first thought after looking at all 3 of the pics was beagle/red doberman mix because of its coloring, size, and other features. Then when someone said Vizla I started to think there might be some of that in there as well. Maybe Vizla/Beagle?... I don't know, guessing breeds is hard. I couldn't figure out one of my dogs breed for a long time and we were under the assumption that she was a yellow lab/pitbull mix then later found out she is a yellow lab/shar pei mix from 2 different vets. Here's a pic of her:
http://www.zacharyodette.com/images/dogssmalltatum.gif
(hard to tell her breed especially in this photo)

Here's my other mixed breed dog, but we know she is a German Shepherd/Border Collie mix for sure because we got her from a person who owned the mom (the Border Collie) and her neighbor owned the GS.
http://www.zacharyodette.com/images/...allshawnee.gif