Knock-knock. Who's there?
Um... A mouse? You may not have been expecting that, but don't put it past this clever four-legged rodent, Little Grisu. In a recent YouTube video uploaded by MouseAgility, one adorable little mouse is filmed exercising his tactics to get the door open.
The owner of Little Grisu is an Austrian animal trainer named Marina. She has been training animals since she was 5-years-old, got her first mice when she was 8 and has been an advocate for the critters ever since. She made some waves recently after posting this video of her mice doing incredible tricks.
While teaching them, Marina says that she uses positive reinforcement only and simply ignores the mice if they do something she doesn't like.
But how does this little guy get someone's attention at the door? Check out the video for yourself.