--- title: What is Puppy ENS & ESI During Service Dog Training? description: Learn about Early Neurological Stimulation (ENS) and Early Scent Introduction (ESI) and how they help prepare puppies for service dog training. image: https://project2heal.org/hubfs/944167_658317c813f6407ab9a08a202a77b6d8~mv2.webp --- [![logo-1](https://project2heal.org/hubfs/Website%20Photos/logo-1.png)](https://project2heal.org/) - [About Us](https://project2heal.org/about-us) - [Our Mission](https://project2heal.org/our-mission) - Local Impact - [Chaperone Program](https://project2heal.org/chaperone-program) - [Puppy Raising Program](https://project2heal.org/puppy-raising-program) - [Stress Down Days](https://project2heal.org/stress-down-day-visits) - [Volunteer Program](https://project2heal.org/volunteer-opportunities) - [National Impact](https://project2heal.org/national-impact) - [Ways to Give](https://project2heal.org/ways-to-give) - [Contact](https://project2heal.org/contact-us) [DONATE](https://project2heal.org/blog/what-is-puppy-ens-esi-during-service-dog-training#XJSJFUZM) - [About Us](https://project2heal.org/about-us) - [Our Mission](https://project2heal.org/our-mission) - Local Impact - [Chaperone Program](https://project2heal.org/chaperone-program) - [Puppy Raising Program](https://project2heal.org/puppy-raising-program) - [Stress Down Days](https://project2heal.org/stress-down-day-visits) - [Volunteer Program](https://project2heal.org/volunteer-opportunities) - [National Impact](https://project2heal.org/national-impact) - [Ways to Give](https://project2heal.org/ways-to-give) - [Contact](https://project2heal.org/contact-us) [DONATE](https://project2heal.org/blog/what-is-puppy-ens-esi-during-service-dog-training#XJSJFUZM) Catch up on Project 2 Heal in the News — Click to See Our Stories Making Headlines! 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By [Project 2 Heal](https://project2heal.org/blog/author/project-2-heal) on December 8, 2021 ![Project 2 Heal](https://3067823.fs1.hubspotusercontent-na1.net/hubfs/3067823/author.png) ###### Project 2 Heal [Back to main blog](https://project2heal.org/blog) Share [mailto:?subject=Check%20out%20https://project2heal.org/blog/what-is-puppy-ens-esi-during-service-dog-training%20&body=Check%20out%20https://project2heal.org/blog/what-is-puppy-ens-esi-during-service-dog-training&media=https://43836172.fs1.hubspotusercontent-na1.net/hubfs/43836172/944167_658317c813f6407ab9a08a202a77b6d8~mv2.webp](mailto:?subject=Check%20out%20https://project2heal.org/blog/what-is-puppy-ens-esi-during-service-dog-training%20&body=Check%20out%20https://project2heal.org/blog/what-is-puppy-ens-esi-during-service-dog-training&media=https://43836172.fs1.hubspotusercontent-na1.net/hubfs/43836172/944167_658317c813f6407ab9a08a202a77b6d8~mv2.webp) Starting on day 3 of a Project 2 Heal puppies life, we begin the processes of Early Neurological Stimulation and Early Scent Introduction. These processes incorporate tactile and olfactory stimulation to expose puppies to novel stimuli and helping the puppy to develop a tolerance for new experiences.   [Previous Post](https://project2heal.org/blog/service-dog-brings-hope-to-despairing-woman) [View All](https://project2heal.org/blog) [Next Post](https://project2heal.org/blog/learn-to-make-no-bake-high-value-dog-treats) ### Related Posts [![April 2026 E-Newsletter](https://project2heal.org/hubfs/Newsletters/april-newsletter-cypress-pups-1.png)](https://project2heal.org/blog/april-2026-e-newsletter) 7 min read [Labrador Puppy](https://project2heal.org/blog/tag/labrador-puppy) [purpose-bred labrador retrievers](https://project2heal.org/blog/tag/purpose-bred-labrador-retrievers) [Service Dog](https://project2heal.org/blog/tag/service-dog) [service dogs save lives](https://project2heal.org/blog/tag/service-dogs-save-lives) [project 2 heal](https://project2heal.org/blog/tag/project-2-heal) [Charlotte](https://project2heal.org/blog/tag/charlotte) ##### [April 2026 E-Newsletter](https://project2heal.org/blog/april-2026-e-newsletter) By [Project 2 Heal](https://project2heal.org/blog/author/project-2-heal) on April 30, 2026 [Continue Reading](https://project2heal.org/blog/april-2026-e-newsletter) [![August 2025 E-Newsletter](https://project2heal.org/hubfs/Newsletters/rosie-pups-august.png)](https://project2heal.org/blog/august-2025-e-newsletter) 9 min read [Labrador Puppy](https://project2heal.org/blog/tag/labrador-puppy) [purpose-bred labrador retrievers](https://project2heal.org/blog/tag/purpose-bred-labrador-retrievers) [Service Dog](https://project2heal.org/blog/tag/service-dog) [service dogs save lives](https://project2heal.org/blog/tag/service-dogs-save-lives) [project 2 heal](https://project2heal.org/blog/tag/project-2-heal) [Charlotte](https://project2heal.org/blog/tag/charlotte) ##### [August 2025 E-Newsletter](https://project2heal.org/blog/august-2025-e-newsletter) By [Project 2 Heal](https://project2heal.org/blog/author/project-2-heal) on August 27, 2025 [Continue Reading](https://project2heal.org/blog/august-2025-e-newsletter) [![Why We Use Volhard Testing at Project 2 Heal](https://project2heal.org/hubfs/Rosie%202nd%202025%20Litter/suki-volhard-7.jpg)](https://project2heal.org/blog/why-we-use-volhard-testing-at-project-2-heal) 4 min read [Labrador Puppy](https://project2heal.org/blog/tag/labrador-puppy) [Services Dog](https://project2heal.org/blog/tag/services-dog) [Training](https://project2heal.org/blog/tag/training) [Puppies](https://project2heal.org/blog/tag/puppies) [Volhard Puppy Aptitude Test](https://project2heal.org/blog/tag/volhard-puppy-aptitude-test) ##### [Why We Use Volhard Testing at Project 2 Heal](https://project2heal.org/blog/why-we-use-volhard-testing-at-project-2-heal) By [Project 2 Heal](https://project2heal.org/blog/author/project-2-heal) on January 21, 2026 At Project 2 Heal, every decision we make is rooted in one goal: giving each puppy the best possible chance to succeed... 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