They started testing very late, so results of the first races were poor.
And then they started testing the limits of the rules.
But critics say it is a mistake to start testing now.
The company said it will start testing the system at customer sites this fall.
I'll be ready to start testing its systems tomorrow or the next day.
"If they can, a child starts testing the system," she said.
"It would be a good idea to start testing for some of the solvents used in the process."
Scientists are recruiting participants, hoping to start testing next year.
He also said the company plans to start testing the chemical for use on cats and older dogs.
For those who want to start testing the software, there are many caveats.