I made this from scrap plywood in our garage for my step-daughter's five-month-old new boxer/lab mix Marley. I used my Kreg rip-cut and pocket hole jig. I even drilled pocket holes to put the four sides together.
That, however, is not Marley in the picture. That is our older Catahoula Leopard Dog Oreo. Marley's owner and her mom chose the color scheme and painted and afterwards, I hung the hardware back on.
The only change I made was to use 1x3 for the entire door rather than 1x2s for the sides.
Thanks for the plan Ana. You are great.