I had to force my dog to drink water and Vit C mixed in it with a 20 cc siringe..why 20 cc it was easy to administer and fit into their mouth.
You have to be carefull not to drawn your dog . Be patient and push about 2 cc at a time.
I had also a dropper but it did not work as well as siringe.
Hope this info helps. Take care of your dog. Elisa..