Just call them and ask them I can't answer that question I'm sorry
Although I am not a doctor I can tell you this, we have a T4 that we can do inhouse if the doctor wants immediate results. We also send out our other tests to Idexx laboratories. I am not sure what a FT3 is but Idexx is the leader in veterinary testing. We do have many ways to treat arthritis with non steroidals, cbd oil, and in worse cases low dose steroids. call us if you would like to schedule an appointment with one of our AWESOME doctors to get more information. 352-326-8940 Thank you Katrina Practice Manager
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