I have 2 Welsh Corgi males, born 8-11-2000. They were on Frontline last year, but discontinued over winter months. We live in Iowa, do I have to have a blood test on them before starting Frontline (heartworm, flea, tick, ear mites)this year? I know that we haven't seen any mosquitos yet this year.
A blood test is recommended for hearworm preventative but not for frontline. vetcare