Translate the following English sentence to French:
"Without free movement, it would have stopped there, but with no frontiers, they contaminated Portuguese and French cattle and we have known about it, even here, since 1986."
S'il n'y avait pas eu la libre circulation, on s'arrêtait là, mais faute de frontières, on a contaminé les Portugais et les Français, et depuis 1986, on savait, ici même.