Aw {{{Bilbo}}}. He may have been cleaning of any foreign smell at the site and self soothing. Are the sutures the type that will need to be removed?
It normal for him to be a bit spaced out. The effects of the anaesthetic probably haven’t fully worn of. Make sure his water is nearby. Keeping hydrated is important. For giving the metacam, you just pop the tip of the syringe in the side of the mouth. Behind front teeth but in front of molars. There is quite a gap there. I normally hold my hand over their head, index finger on one side of nose, 3rd finger on other, Then move cheek & lip back with index finger and pop syringe in. I usually leave them on the floor to do this but you could carry them to a counter top fitst if it’s easier.
Yes, EC is classified as microsporidia, so in fungal family. Panacur is called a dewormer though and is used to treat various intestinal worms. And EC as you know.
Were you asking the vet specifically about EC or just Panacur? Perhaps her advice was just for general worming for anything picked up out doors?