BUN-to-creatinine ratio - Definition. [ 1 1] Urea and creatinine are nitrogenous end products of metabolism. 2  The normal range of urea nitrogen in blood or serum is 5 to 20 mg/dl, or 1.8 to 7.1 mmol urea per liter. 3  The normal serum creatinine (sCr) varies with the subject's body muscle mass and with the technique used to measure it.
Direct from petco.com: The minimum age for working in our PETCO stores in 18 years, with the exception of Alaska in which the minimum age requirement is 16 years.. Direct from petco.com: The minimum age for working in our PETCO stores in 18 years, with the exception of Alaska in which the minimum age requirement is 16 years..
Best Answer: Petco doesn't hire you unless you're 18, and you have to be 17 to work at Petsmart. How old do I have to be to work in a PetSmart store, or in a PetSmart Distribution Center? You must be at least 17 years old to work in the stores, and at least 18 years old to work in the Distribution Centers.. 5.