Animals

In Halacha, Jews are forbidden from having animals do prohibited melachot on Shabbat. My question is, is there any issur of Lifnei iver with animals, or no, since animals don’t have the same free will humans do? As an example, putting an electronic color on a dog, which the dog could activate on Shabbat, before Shabbat would be setting the animal up to cause melacha on Shabbat, so would it be Lifnei iver?

Did the Old Testament's sacrificial lamb have to be white or could it be a black or brown lamb? Please note the Book and verse. Thank you.