Ok let me better express what I'm trying to do and my question which I feel I have an answer to now. I am trying to keep blood sugar levels up and store and use energy in time period where the dogs stomach and large intestines are empty. Meaning defecation has taking place and food being digested is in a liquid state and converted to energy. This to me will allow stronger workout with better blood sugar level and a ready energy supply. Figuring 4 to 6 hours stomach digestion and knowing when to look for my dog defecation regularity will give me a gauge on digestibilty and best work out periods feeding twice a day. Of course I'll be splitting the meal volume. If I am gauging right at 8 hrs feed to empty than my 2 workout periods would have a 4 hr window giving me 12 hour increments between digest and work twice a day. Reading this material I'm bout to post put me right on the money though and I understand I'll have to make adjustments for individuals.