Table 2. Summary Information on the Four Lactating Dairy Cows Used in the Phase II Definitive Experiment 238 Animal Age (Years) Approximate Sacrifice Time Post—Dosing 19.0 8 135 hours 764 21.3 6 140 hours 17.5 863 20.3 7 13 days 16.6 736 22.6 7 13 days Cow Number Pu 1.V. Dose (mCi) Pre-Study Weight (kg) 119 16.0 843 179 16.3 123 128 Dose (pCi) per kg 183