I disagree completely. Having owned two labs - it's the nature of the beast. Labs tend to charge into things - like unkempt areas. Mine would occasionally get cuts on their forelegs. Probably from old barbed wire. Anti-biotic cream - butterfly bandage - elastic wrap covering. If you want a dog that will just tiptoe thru the tulips - don't get a Lab. My current dog - Brownie, a Chocolate Cocker Spaniel - likes to tiptoe out into the weeds.
It was difficult for me to keep either Lab out of my little lake. One would even routinely jump off the cliff - out into the lake. Where he would jump was a 25 foot drop to the water. You could hear a great "OOFF" as he would hit the water. The other - skinny down the cliffs and then jump. A 3' to 5' drop only. Then into some dry dirt and they wanted to come into the house. Fortunately - neither objected to being hosed off.
Life out here can be a thrill a minuet for a dog. Cows, coyote, turkeys, birds of all kinds, skunks, porcupines, raccoons, pocket gophers, deer, elk - the list is never ending. And if you get bored - just dig a hole, a REALLY BIG hole.
I never have my dog on a leash around the property - I let them run, but always under a watchful eye. Just too many distractions to do otherwise.