Dealing with Wood Knot

Our human's brother replaced the wooden fence himself some time ago.
One of the wood pieces had a glaring 'unsightly' wood knot that seem a tad out of place.
Retired with a lot of time in hand, he browsed around the shops, came across this sign, immediately bought it and promptly got down to work. 
This is the result!

Do you like it?
Our human feels that instead of a dog, a wombat would be more appropriate as the wood knot looks 'squarish'. Wombats pass out 'cube poop'! 
Whatever it is, our human loves this tongue-in-cheek sign!

Perfect Circle

During the morning walk one day last week, a little voice said, "Look right!".

Our human immediately stopped, looked to the right of the path and saw this vine of perfect circle.

After having walked this path daily on weekdays for more than 10 years, our human never really notice it.

Now, the big question is, whose voice is this?