There is a much, much bigger problem.
15% of milk-giving cows in the US have stapled stomachs which make the milk they give Chalav Treifa an Issur D-Oraisa.
Since all milk is mixed together in huge tanks, you can not rely on Kol Dporush. It is safe to assume that unsupervised milk coming from the USA is one-sixth ossur min hatorah (much worse than chalav akum). It is not bottul.
This would even render powdered milk also prohibited.
Chalav Yisroel companies are very careful that the farms they supervise do not use cows that have had this procedure.
So this problem is not only for Israel