It is not an instantaneous process to train a high-energy dog. Astro, a Doodle bursting with energy and character, required some time to adjust to a new routine with the Halo Collar 5. As the system was used more, the alterations began to be more apparent. During the training sessions, Astro started feeling more comfortable, responding to the stimuli and gaining more confidence within the virtual bounds. In this Halo Collar 5 Review, I will give you the details of this encoun