The study below was quoted to me on another forum. Hope this is what you wanted
"Arnbjerg (1992) studied the time of passage of various commercial
food items through the stomach of dogs (25-30kg) by radiography. The
types of food used were (1) dried food with 10% moisture, (2) canned
food with 70% moisture, and (3) fresh food (fish) with 75% moisture.
After food ingestion the animals had no access to water or to any
other type of liquid.
In group 1, the food remained unchanged in the stomach for 8-10 hours
after completion of the meal. After 15 hours (+/- 1 hour) the stomach
appeared to be completely empty.
In group 2, the food started to enter the duodenum after 4.5 hours
(+/- 30 minutes). The stomach appeared to be empty 7-8 hours after eating.
In group 3, the food was observed in the duodenum 30 minutes after
ingestion and emptying was complete 4-6 hours after ingestion.
The results of fresh meat emptying are in agreement with the results
for labelled chicken liver reported by Cullen & Kelly (1996) who found
a gastric emptying time of 3.5 hours, including a lag phase of 71
minutes (+/- 9 minutes).
However, Meyer et al. (1985) found a faster gastric emptying (3 hours)
for radiolabeled steak and liver in large breed dogs (20-25kg body
Compared to Meyer et al. (1985) Burrows et al. (1985) observed
comparable results in half-emptying time in large breeds (26-32kg body
weight) using different isocaloric commercial diets. Canned meat based
food (77% moist), dry cereal based chow plus water (77% moist) and dry
cereal based food were emptied in 3.8 hours (+/- 36 minutes), 2.5
hours (+/- 36 minutes), and 2.4 hours (+/- 36 minutes) respectively
(differences not significant).
The large difference in half-emptying time of dry food between the
studies is probably due to the fact that sometimes, like in the study
of Arnjberg (1992), the dogs had no access to water."
Arnbjerg, J. (1992). Gastric Emptying Time in the Dog and Cat. Journal
of the American Animal Hospital Association. 28, 77-81
A Review of the Physiology of the Canine Digestive Tract Related to
the Development of in Vitro Systems, Nutrition Research Reviews
(1998), 11, 45-69