There are two different types of stacking that we should consider when with our dogs whether training, working or just hanging out and that is dopamine and cortisol stacking. I’m sure it is safe to say that most, if not all of us, should know off the bat that cortisol, while unavoidable, has negative implications on our overall wellbeing when chronic or in excess and dopamine is associated with more positive situations. When there is an accumulation of either you are at a higher risk of having your dog display undesirable behaviors. First let’s talk about stacking in general. If a dog comes across multiple occurrences of either something exciting or otherwise upsetting in close succession to each other this can cause our dogs to become so consumed by this stimulus that they are unable to focus on learning and training is unable to be achieved. Cortisol Stacking Cortisol, as previously mentioned, is a hormone that has a negative impact on our overall wellbeing when chronic or in excess. Things that can build up cortisol are punishments, aversive training methods, unpredictability, confinement, sensory distress and frustration. Cortisol in acute situations, such as a consequence for not performing a known command and so the opportunity for a treat/reward was lost, are not necessarily bad. This is essential to better perform cognitive and emotional tasks. The method in which cortisol rises matters greatly such as aversives. With aversives the cortisol levels increase which reflect heightened stress and anxiety which can also contribute to behavioral issues such as aggression and/or fear. Cortisol in the context of reward based training methods are not elevated which therefore reduces stress and increases learning. Dopamine Stacking Now with dopamine I trust we are all familiar that this hormone is associated with reward and arousal which can cause dogs (and people) to become “addicted” to dopamine triggering events. When dopamine is involved and reinforced by some kind of reward then the action is likely to be repeated. This all in all sounds like a good thing and for the most part it is but there is a caveat.