Not exactly my area of expertise, though I do have some quality background knowledge of a wide variety of different land based species as well (Biology, many years), but be careful w the dogs outdoors, Dan. Don't get too lax/trusting with that mix/diversity of skilled predators at your doorstep.
While the bobcats/mountain lions definitely pose a serious threat, especially if it wernt for the native deer population as you mentioned, they are naturally very weary of human activity/interaction ... But, with that said, the coyotes, assuming you have a population in your area, are the opportunistic/instinctive predators which could easily pick off your K9s, uninhibitedly ..
On a positive note, I remember recently reading you have a number of Danner Mag-Drives currently operational/in service... Find feasible replacements for those inefficient water heaters and you'll indubitably notice a significant decrease in peak water temperature(s) within your system ! If you'd like any recommendations or to run something by me for a 2nd, educated/knowledgable/experienced, opinion Id be glad to help. Feel free to PM me