Only at erection stage do you find out that to enter the pen, you have to crawl under the bar over the gate. Also the proposed two 1mm steel cables which are shown going across the centre of the pen at the top of each side are likely to decapitate a medium size dog if it gets over excited and jumps. 4 x2 metre cables from the top of each corner to a ground anchor set outside the pen would suffice. The gate area should be clear to approx 1500 mm high to allow access, easily done by elongation of the posts either side. Other wise it seem good.
