Why does my dog do that?
Why does my dog pee directly on top of where another dog just peed?
Last updated 23 September 2026 · How we write and check this
Short answer
Marking over another dog's urine, sometimes called overmarking, is a way of layering a dog's own scent onto an existing mark, either to assert presence in an area or simply to add to an ongoing chain of social information other dogs will investigate later. It is common in both male and female dogs, though intact males do it most frequently.
A social scent relay
Rather than simply toileting, a dog that specifically seeks out and covers another animal's fresh mark is participating in a kind of layered scent conversation, where each dog's contribution stays detectable to the next dog that investigates the spot, building up a record of who has passed through recently.
Hormonal and social influences
Unneutered males tend to overmark most frequently, likely connected to testosterone driven territorial behavior, though neutered males and both intact and spayed females also overmark at times, particularly in areas with a lot of dog traffic, such as a popular park entrance.
A normal part of outdoor exploration
This behavior is a completely normal part of canine social communication and does not need managing, beyond the general etiquette of keeping a dog from marking directly on private property or someone else's belongings.
Key takeaways
- Overmarking layers a dog's scent onto an existing mark rather than replacing it.
- It functions as a kind of ongoing social scent relay between dogs.
- Unneutered males overmark most frequently, though other dogs do it too.
- This is a normal social behavior that needs no correction.