Of our two cockers, the older (black) girl is now 90 percent deaf. The younger (brown) guy has figured this out and ensures the deaf one knows when something important is going on (back door open, feeding time, someone at the front door, etc). He bumps his nose to hers and points with his nose towards the event.

Cockers are extremely smart, but I can't figure out how the younger one knows the old girl can't hear!