My Collie figured out how to open the back door by nudging the handle with her nose. It was impressive to see, but also a bit of a hassle because now I have to keep the door locked all the time.

I was amazed when my Collie learned to use the doggy door without any help. She watched me open it a couple of times and then just figured it out on her own. It was like she had an epiphany!

She can open the cupboard where we keep her treats. It's a bit cheeky, but she's super smart about it!