I don't know about in Sweden but in the UK the syringe in the metacam box is listed in kg doses, so you simply draw the syringe up to the 3kg dose line. That does seem a very small amount, BUT we must remember that the metacam here is being given to reduce nasal inflammation not for pain relief, so it is very possible that it will work perfectly well at the lower dose for the purposes of reducing inflammation. I would give it a go on the low dose to start off with and then talk with her about increasing it if it is needed. Good luck xx