Dexter is hyperactive even after a 40 minute walk and his humans just don’t know how to calm him down. For they had been advised that a physically tired dog is a happy one.
Instead they changed their approach for they now know that Dexter sees the world through his nose. With certain changes in the walking equipment like the length of the leash encouraged him to indulge in natural behaviour like sniffing which helped him calm down.
Add to that an every day mental enrichment activity that engages natural behaviours centered around thinking, digging , chewing & sniffing. Now makes Dexter a happier dog.