Dosingof drugs is calculated bypatient weightmultiplied times the dosing parameter divided by the concentration of the drug. I personally feel that metacam, while better than nothing, is totally insufficient for post-op pain control....and we have done a lot of spays/neuters. I have discussed this with several of the exotics vets I know and they all agree. But to answer the question, if I were to use metacam, I would use .5cc of 1.5mg/mlfor my 8 pound rabbit.
I would urge extreme caution in administering drugs. You have to know what is involved in calculating the dosing. For example, I have Tramadol and it has to be compounded. Well, Doctor 1may write the RX for a concentration of 5mg/ml whileDoctor 2might specify 10mg/ml for the drug. Now, lets say the calculated dosing of Tramadol as written by Dr. 1 is for a 1.2cc for say a 4.5 pound rabbit. Now if you give that as compounded by Dr. 2, you have effectively doubled the dose....not always a good thing. And the actual concentration may not be so obvious. And some drugs my be labeled as "Drug X" but it might have different concentrations...therefore, the dosing for one 5 pound rabbit might be radically different for a different concentration of the same drug. I would again urge extreme caution in giving dosage information just because one particular animal was given that dosing. If the concentration of the drug is different, it could lead to disasterous results.
As far as my dosing of drugs...my vet and I have a firm understanding and agreement on pain control. In almost every case, I use the standard dosing amount and use the medium dosing...in other words, if the dosing range is 2-4 mg/kg....I usually do 3 mg/kg. I usually do a little more for first dosing....it's a wildlife trick we use for "shock" dosing and then back off the subsequent dosing. I also attempt to limit drug use as much as possible because there is always a trade off even in the so called "safe" drugs.
Randy