A:AnswerThe most common accessories would probably be smart lights. Be aware of your internet speed and connectivity throughout your home since the more devices you add could affect efficiency.
A:AnswerThe 7” hub does not have a built in camera so you can talk to your dog through the hub but your dog won’t see you unless you have a separate camera setup. The 10” hub max does have a built in camera however so you get more than just a bigger screen with it compared to the 7” hub (obviously hub max costs considerably more). So I guess it depends on how you want to communicate with your pet and how to setup with other devices like cameras or smartphone.
A:AnswerUnfortunately, your Nest Hub can't replace the Nest Guard. Only a device like the Google Nest × Yale Lock can connect to the internet through a Google Nest Connect or Google Nest Guard in your home.
A:AnswerIt has an auto dimmer when your lights are off it turns nearly all the way off. You can also set it to stay at a certain brightness or use ambient mode (auto dimmer) see pics. I have found the auto dimmer to be great.