You're traveling a distance of 4 km on this moderate trail. The hike is therefore not too long. The average length of all hikes in the Valais is 12 km.
Taking your dog on this trail shouldn’t be a problem.
Make sure to bring sturdy footwear on this track. Hiking boots are highly recommended. There are places to buy beverages and food along the track. However it’s always recommended to bring enough water and food along with you.