Abstract
Summary
A meal containing 1 g of lard per pound body weight in a meat patty was given to male mongrel dogs after a 16 hour fast. Lipemia clearance was observed in dogs of 4 age groups as follows:
Group 1, less than 1 year, Group 2, 1 to 3 years, Group 3, 4 to 8 years and Group 4, over 9 years. Peak lipemia was apparent after 4 hours in Groups 1–3 and was greater in Group 2 than in Group 1 and in Group 3 than in Group 2. In Group 4 dogs peak lipemia occurred later than in the others but was not as great as that observed in Group 3. During restraint in a modified Pavlov rig for 6 hours urinary catecholamine and corticoid excretion increased approximately 4-fold without regard to age. Contrary to expectation, lipemia clearance was accelerated and serum NEFA did not rise. Increased clearance seemed to be correlated with activity in the rig.
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