We all rush to scrub the greasy mark the cat leaves on the door frame, when it’s the day that mark stops appearing that should worry you
That oily smudge your cat leaves on the door frame isn’t dirt—it’s a chemical love letter loaded with pheromones. But here’s what most cat owners don’t realize: when that mark suddenly stops appearing, it might be one of the earliest warning signs that something’s seriously wrong with your feline friend.