Vet says she is an American Foxhound.  The clinic also says she appears to be about 8 yrs old, but actual age estimated to be more like 2 yrs old.  Teeth worn down, not by age, but prob. by gnawing on kennel door.  She has been bred, no way to tell how many times.  She shows signs (behaviorally) of having been kenneled most of the time.  These are indications that she was kept for breeding purposes, probably not a puppy mill per se, but more likely someone bought her to hunt & she didn't make into a good hunting dog, so they bred her to "try to get some good out of her."  All speculation.  What is clear is that she'd been starved/underfed & was found in the middle of the lake... She was also covered in ticks.  Luckily, she tested negative for tick-borne diseases.  Unfortunately, she is HeartWorm Positive & will have to go through treatment for that.  She also had whipworms and roundworms.