After uploading writeInstinct.ino, you need to run the program and enter "YYY" to save the constants. Then upload OpenCat.ino for the full functionality.
As I read this place, I proceeded in order.
4.2.5. Connect the uploader
That's all I've done.Then it became a brick.
Tell me how to reset it.
Please provide more detailed description of your problem: how did the dog behave before it got sick? what did you do? pictures and videos will be more helpful for diagnosing the situation.
You really need to start from here: https://bittle.petoi.com/
It is not a toy but a complex robotics project so you need do your part to make it success
If you get stuck on some particular step it will be easier to help you.