Newfies come very close to Leo's for me so it's not so much a breed specific thing it's more about Inventory. Newfies have become popular enough that a whole lot of designer /bad backyard breeding such as "bred to not drool," has introduced health issues. If I look at foundation lines such as my Dad (a breeder,) had in the 70's - Nashua Auke, and compare, dramatic and incredibly sad differences. Drool is a side effect of their amazing head structure allowing them to breath and swim with a water rescue. Leo's are harder to find, fiercely protected by the tight network of breeders and owners. My best bud is a breeder so I'm very lucky. I'm sure you know all of this so- additionally Newfies can be trained to be great with Chickens, but my personal experience has been that Leo's handle the battle against their understandable prey drive better than Newfies. That said they are the last dog that folks should get as outside flock protection. Leo's live to be companions, they can't be left outside alone. They are so addicted to their people that a benefit is the grass is not greener on the other side. If I leave my driveway gate open my Leo's will sit by my side and we all wave to my Newfie who dead runs off to an adventure. Bernese are amazing btw and it's a common combination that Leo people will also have Bernese. Collies I don't have personal experience with, just Shelties (VERY good with horses btw. My horse trusted my Sheltie to trot right next to his legs but he would bite my Newfie if he came close enough.)just out of curiousity: What extra Leonberger gives you that Newfie does not?
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