BSK you will need the greens to help keep enough bulk in the dogs diet to move the stool through the bowels to avoid any constipation. No matter what type feed keep one uses. There has to be something in the total feed mixture to add bulk for proper fluid absorption and stool elimination. Greens added will not hurt any sort of feed keep being used.

Greens will be your best over all choice for natural fiber. One of the reasons the older feed keeps kept some kibble was to insure good bowel movement and allowing the dog to feel like it has eaten a full meal.

Eliminating the kibble in a hot weather keep is not a bad idea, should help the dog maintain a leaner weight with no access fat in the gut etc. areas. If what you plan to do and have already seen excellent results in another show or prekeep. Go for it. Long as your dog stays bright eyed/glossy skin/blood red gums/no dehydration/kicking up the dirt after a no straining solid bowel movement. You are good to go.

Will have to look up the info on that Lixotinic product. That is a new product I have not read about. There is nothing wrong with good quality supplement products used in moderation. But still no substitute for good solid food. Just like any hard working human. That dog has got to feel like it has eaten a solid meal of life sustaining food. If not, will become ravenous and even start eating it's own stool etc. Right in front of your eyes. LOL

If I am not giving BSK the exact right answers he is asking. Please, the dog persons with more newer keep knowlege, chime in and help this fellow compadre out. I always believed any well intentioned dog man should be given a fair shake in the game. Helps the best over dogs to win and used for future breeding to improve the sport. Cheers