If I'm reading correctly, there is sun on the sun shelf 100% of the time, right? If so, keep in mind you will want an umbrella or some sort of shade for part of the shelf. Your dogs (senior or not) will appreciate it. Oh, and you will too! My granddog loves the sun shelf, but when it's really hot, he plops down on the shaded side of the shelf.Here’s a bit of the mock drawing- I put 4 feet on the left hand - 4 on the front- then 10 along the right hand side which is behind the tanning ledge and is where there’s full sun 100% of the day. Behind the pool on the left hand side I put a small 3 foot walk way to the spa or pavilion. On the right side behind the pool I figured I would extend that a bit. It’s about 1,200 sq feet. Any changes I should do??