What about a wood tile to keep sanitary but look warm & homey A lot of wood to soak up moisture, but I like this because it's got that barn feel. at least it looks like the individual stalls are tiled.
Things to consider-sloped floor with drain(s), overhead storage, sinks, hideaway trash bins (probably to store dog food in), separate area (with couch) for sitting.think a hide a bed for whelping time would be important
I love how the dogs wertr incorporated into this kitchen design. Dog feeding station at the end of the kitchen island.food and water bowls are built-in and the drawers above display cute dog bone cut outs for handles.