One Cat, Two Cats

We have a whole family of cheeky blackbirds, possible a couple of generations now, who have my yard as their territory.  This includes the very valuable food source of cat biscuits (kibble) that are sometimes supplied around the outdoor walkways for the cats to 'hunt', and the food bowl that used to be placed in the laundry.   Well? You gonna help me, or what? I say 'used to' because the laundry door was always left open for the cats to come in and out, and the birds quickly learned to do the same.   The cheeky sods were always a feather's breadth from being eaten, much to Noomi's displeasure.  They learned to sit on the gutter, look for where the cats were and then pop in for a feed.   If the bowl wasn't there, or if they got nosey, I would occasionally find one wandering into the hallway, and once one got trapped by an incoming cat and made it's 'escape' into the lounge...causing all sorts of excitement. So, it was not alto

The cat fencing had restricted the cats to the backyard, so I started to build new runs into the front yard area.  The initial walkway has proved very popular. 

I had purchased a bunch of floating shelves with the intention of creating cat friendly climbing walls.  BUT, I had a real problem getting floating shelves on the wall. I just could not get the hang of the ones I had purchased.  Then I found the, rather expensive, but specialist screws for floating shelves and voila! suddenly I was on a winner.  I still wasn't convinced that they would withstand the weight of cats leaping about on them, but at least I could get those damn shelves out of storage.   I put them up, planning for no cat access, assuming they would rip half the wall out and come tumbling down, with whatever ornaments were in them if a cat did leap on them.  But the cats knew better.  I did hold my breath as Noomi, the flying lead brick (she is a true Tonk and weighs twice as much as she appears to), gave them a test run. Much to my surprise, they were steady as a rock.  When Lily, literally half Noomi's weight, gave them a trial I had no doubts they weren