I have a 10 week old purebred female yellow Labrador Retriever. She was bred from a various bird hunting family, and their dogs are slim and in great shape. From what I could find online, they are more of an 'English' style Lab, even though it appears there is no official distinction.
I am going to build a fenced area in my back yard that has shade/sun/cover. We already have a larger backyard that is fenced at 6 feet (183 cm) high, but I don't want her roaming the whole backyard during the day while we are gone. The long-term plan will be that she can go outside to it via a dog door at any time when she is older and can be left alone without needing supervision during the day.
The overall area of this will be 300 ft2 (around 27.8 m2).
The problem is that I don't know how high I should build the fence so that she cannot jump over it when she is fully grown/most capable. I've heard a lot of conflicting numbers from other websites, with some stating their dog jumped over a 6 foot (183 cm) fence!? Is that even possible?
I respect the SE community answers, so I've come to ask what you think.