Veggies are a good addition but actually not essential - as long as she is eating pellets and hay she will be taking in adequate Vitamin C, so there is no need to include that as a supplement.
As for the probiotic it is important, so you can try mixing it with a small amount of something like a fruit purree, or to be honest just pick her up and syringe it directly into her mouth.
This really is the best way to make sure she takes it all, and once you get used to it, the process is fairly fast and won't stress her too much.
Please also bear in mind that this Forum is staffed by volunteers who have their own animals, families and jobs to attend to and your tone towards
@VickiA who was trying to offer you help was not very polite. We are all doing our best to answer specific questions, but if you personally feel that anyone (staff or members) falls short of the mark they still need to be treated with respect. Being rude won't get you anywhere.