Silver and Alex
Alex had hip dysplasia. As he got older and his condition got worse he needed assistance with certain things, like getting in the van. He hated any amount of help and would always glare at us when he needed it. He would put his front paws up on the floor of the van and we would lift his rear end inside.
Sometime after this became a daily routine, Silver started to mimic Alex's behavior when getting in the van. If it wasn't bad enough that I would have to lift Alex, now I had to lift Silver as well.
It was cute and funny at first, but as time wore on and we watched Alex's legs decline, Silver's copying became a reminder of how painful Alex's situation was. While we were trying to make the best out of the situation, Silver's behavior emphasised the obvious.
Looking back it is still difficult to see how Silver interpreted this pattern. Was she emphasizing with Alex, or just copying him thinking, this is how we get in the van now? Alex was her first and best friend and I know she still misses him to this day. Every so often she will still get in the van with her front paws and wait to be lifted up, letting Alex's memory live on.