Argh!

So I have finally decided on a project for the last lesson in my course, a child size sweater. Working on my first row, I feel an odd tugging on my yarn. I look down and see our younger cat sitting between my feet, yarn dangling from his mouth, chewing!  He had already chewed completely through the yarn. The yarn I am using has graduated colours and, this early in the project, it's better to start over then join the ends.
*sigh*