The sky's the limit!
Poor dog, it must be like living directly under the El
My dogs used to hide out under my layout like it was their doghouse.. I had to put a stop to it though.. Mastiff tails alone can whack wires loose, and it was only a matter of time until one wanted to floss their teeth too
You deserve a medal for having to rail that second tier alone.
What else is there to say?; except 🎉 "happy-birthday-cake-layout-day"🎈😬
...or "Congratulations on the new family member...I see it's a little "toy"
DOC, Congrats on your three tier layout. Looks neat. I did essentially the same thing about three or four years ago when I constructed an all tinplate 4x3 layout using the same Marx trestles you did only I quit at two tiers rather than three. Photos attached.