Yikes! He's about to turn 4.
There's no way for me to weigh him but he seems comparable in size to the other boys here (although he gets more treats so may be a bit...bulkier). How much should he be getting?
*I should add, to clarify, that I'm giving him the 10% drench on bread.
At that age he should get three ml for five days then ten days later for another three days minimum, five is better to get all types of worms.