Thank you once again for these helpful replies. I apologize for taking so long to reply. I have an Internet connection issue, which is so annoying.
I want to say a special thank you to you, Anne, for your very kind offer. You are an angel! (Anne helped me when I first joined YT years ago and was having problems with Tootsy's digestive issues. She recommended Susan at 'Ask Ariel' and Susan was a great help. ) I will see what the dietitian has to say and what he charges to import the supplement. I would be so grateful for your help in sending the supplement to me, should the dietitian try to make an additional profit on it himself. I really appreciate this, Anne. You really are a special person.
I am going to try giving her 1 Tablespoon of zucchini each day and see if she reacts to it again. Perhaps giving her half a zucchini was too much to start with, even though it was a small one. Then, if I find that the dietitian is of no further help, I will go to petdiets.com.
I will keep you all informed as to how things go. It may be of help to someone else on the board with an allergic dog with food sensitivities.
Thanks again. xxx