Research Communications of the 24th ECVIM-CA Congress

At the start of the study serum cobalamin was subnormal (<290 ng/L) in 4 of the 14 cats (range <150 to 244 ng/L) and within the reference range (290 to 1499 ng/L) in the remaining 10 cats (334 to 1065 ng/L). Serum cobalamin was above the reference range in every cat (1892 to 13109 ng/L) after one week of supplementation and remained above the reference range in every sample collected during the supplementation period, with the exception of two cats with values within the reference range when supplementation was stopped. Serum cobalamin 1, 2 and 3 months after cessation of supplementation ranged from <150 to 1783, <150 to 1494, and <150 to 948 ng/L, respectively. At the end of the study serum cobalamin was subnormal in 5 of the 14 cats.