I thought I would have a couple of weeks to figure out how to keep my cat off my container of carrots, but they have come up already! I can't believe it. It usually takes at least two weeks and sometimes three before carrots come up. I moved the container off the porch and into the backyard, so hopefully that should solve the cat problem.
TIP: Make sure to keep carrot seedlings watered regularly. They are planted very shallow at this point, so it is very easy for them to dry out. Also, make sure to keep the area weeded very well because carrots are so small and tender when they are young that they can't compete with weeds for space to grow.
It's a little hard to see in the picture, but I have all five rows of carrots coming up.