Use either a one ml or 2 ml syringe.You could cut the nozzle off to make a bigger hole,but that is up to you.Make the feed like a thickish soup.Put the end of the syringe into the side of the mouth,not the front.Push about 0.4 mls in.Let the piggy have time to swallow before pushing more food in.I find that giving about quarter to half a ml of plain water after every 2 mls of food,helps the pig to swallow.
I do not personally feed just C Care,but it is o.k.to do that if you wish.I prefer to put some dry mix in a coffee grinder and make a fine powder,mix with warm water to a thin paste,then add one or teaspoonfuls of CC to this.The jars of organic baby ourees are easy for the piggies to swallow as well.You can give this straight from the jar,but I mix in with the other food.Sometimes if you make the mix thicker the piggy will eat it off a teaspoon.ILt is just trial and error really ,because some pigs will relish the feed and grab the syringe,other pigs will just resist.
Good luck with this.