Kusanar
Loving the herd life
Judging by my experience eating... eating a lot of dry powdery texture sucks all of the moisture from your mouth almost instantly and doesn't encourage salivation. Eating something pellet textured, you can roll it in your mouth more and it stimulates the salivation glands more. With a soaked powdery texture, it is already moist so it doesn't matter if you add extra moisture to it when chewing.
I would actually be more worried about the ground up pellets than whole pellets. When I feed the horses I use a 2.5 gallon bucket (only giving them enough for a treat) and put 4 1.5 cup scoops of hay pellets and 1 scoop of beet pulp in the bucket, fill to the brim with water (cold from the well) and it fluffs fully in about 10 minutes or so. This gets it fully expanded but not WET. I don't know how you would fill those gutter feeders easier though. I just dump mine in an empty 50 gallon water trough.
I would actually be more worried about the ground up pellets than whole pellets. When I feed the horses I use a 2.5 gallon bucket (only giving them enough for a treat) and put 4 1.5 cup scoops of hay pellets and 1 scoop of beet pulp in the bucket, fill to the brim with water (cold from the well) and it fluffs fully in about 10 minutes or so. This gets it fully expanded but not WET. I don't know how you would fill those gutter feeders easier though. I just dump mine in an empty 50 gallon water trough.