Dog training glossary
Splitting vs. Lumping
Quick answer
Two training philosophies: breaking a behavior into many tiny steps (splitting) versus teaching bigger chunks at once (lumping).
Written by the TailorPup team, updated September 2026. See our editorial approach.
What it means
A "splitter" breaks a goal behavior into the smallest possible approximations, rewarding each tiny step before raising the criteria, which tends to produce steadier progress with less frustration. A "lumper" asks for a bigger piece of the behavior at once, which can be faster when a dog is confident and picks things up quickly, but risks more failed attempts and frustration when it isn't. Most experienced trainers move fluidly between the two depending on how the individual dog is responding in the moment.
A real example
Teaching "spin," a splitter rewards a dog for turning its head, then its shoulders, then a quarter turn, then a half turn, before ever asking for a full circle; a lumper might ask for most of the circle right away and only break it down further if the dog struggles.
Common mistake
Lumping by default with a dog that's already struggling or frustrated, rather than switching to smaller splits the moment progress stalls.
Related terms
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