What would we do without our furry friends? As you say, they are a constant source of amusement.
These photos are hilarious, very much a case of "If I can't see you, you can't see me!!"
I love big dogs hiding under draperies. Only the face is hidden.
Cats of course are masters at this. They want to be seen to be hiding as opposed to really hiding.
Just try calling a cat to give it medication. They become invisible. My neighbour and I searched everywhere for her cat. Everywhere! There were some closed boxes of books in the hall. One had a cat in it. She climbed in and pulled the lid down convincingly. We stood by that box and called her and she sat absolutely still. She doesn't mind what we do, she just likes to make a point.
That's funny. On the other hand she is so prickly, who would want to bother her.