It turns out a husky mix is stronger than curtain sewing, so I made these curtain rings / holder, they have indents so in theory they can break away if the curtain is pulled on, or in practice 3d printed parts will also just break before a curtain rod or curtain will, and small 3d printed parts are convenient to replace when needed. The rings and holders work well even if you don't have a destructive dog, the model can be found here: https://makerworld.com/en/models/3486951-curtain-ring-and-holder