I am not the Lacy expert, however we did have a momma lacy dog back in the 70's and 80's that had over 100 pups and help keep the breed alive when numbers were low. Most Lacy today can be traced back to that old momma dog, or to the line she came form down at old man Long's in Kingsland, TX. Think #s are as high now as they have ever been.
Rat is my dad's dog, so I don’t make the vet trips, so I do not know what he weighs....My best guestimate would be 32-36 lbs. He runs constantly (mainly chasing my deer) and has no fat whatsoever and is all bone and muscle. Bigger Lacys probably have some BM Cur or other stuff in them as a male Lacy should not break 40-42 lbs in my opinion.
Cow dog, coon dog, hog dog they are...Bird dog, hard to see that one. Rat helps the old man pen cattle and he will tree a coon any night and let you know it. They are really bad about being a little trashy and they will chase deer if they can get close to one and only near-death from over heating stops them, but a shock collar normally takes care of that.
They can be a heck of a guard dog as well and some have to be watched around children as they can snap at times. But, these dogs really were not bred to be kid dogs, but rather working dogs as a better athlete on 4 paws you would be hard to find, and a grittier dog you will NOT find.
Hope that helps...
Sure CW2011 can add to this as well.
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