How great would it be if dogs could use the bathroom in the house? Like this, they wouldn’t need to wait for their walk to relieve themselves.
So far the only dog “toilets” that exist are large pots covered in grass. These pots need to be emptied and cleaned.
A really practical dog toilet would be connected to the sewer drain. It could be similar to the squat toilet and covered by synthetic grass (dogs like going to the restroom where it feels natural). After the dog uses the toilet, the owners would flush it - better than picking up dog poop from the street.