I am aware of this and I was monitoring the behavior when she started approaching that part of the backyard. The goat is somewhat pretty smart because it does not touch the leaves at all. Just the fruits.
You're right. I am aware of this, and we're planning to get one more goat and also a dog. Right now, the goat seems to be pretty happy roaming around the backyard with all the chickens. It even waits with them while they lay eggs, etc. Pretty cool. But sure, you're right :)
Another story from a fellow hacker with a backyard goat - It actually starts in a very subtle way. Goats have different tastes and moods, and it's not like they eat everything right away unless the density of a goat per backyard m2 is too high. I started giving mine some free "roaming" time with the chickens every day before the sunset. It looked very innocent - first few days she ate just some weeds, nettle and some low hanging branches of pear trees. No worries, I was planning to cut those anyways. After few weeks of not paying that much attention in the evenings, bottom third of all our ~12 trees were gone, she got into salads, potatoes, zucchini, pumpkins, peppers and cucumbers, all nettle was done, and she started checking out tomatoes (which seemed that she is really really not into at first). I am building a new goat house with it's own separate "backyard" with weeds that she won't be able to escape. :)