Very nice shots! I think #2 is my favorite as well, though I'd be tempted to crop some off the top.
But now I'm gonna be a bit of a Negative Nancy...well, I guess I'll have to be a negative Sharon instead of Nancy.
PLEASE do not lure them or any other wildlife with fake food (or even real food, unless it's in your backyard and is really meant for them to eat), not EVEN for the most spectacular photo op possible.
There are many reasons this actually does matter but two of the biggies are:
1. In many places, it is actually illegal to "bait" animals in order to get photos of them. Again, the backyard is one thing, but if this was at a park or something, you could potentially be fined for it. Not likely, but possible.
2. MUCH bigger reason, in my book, especially since you were using "fake" food--You can actually diminish an animal's chance of survival by doing this. Animals expend a LOT more energy than you might realize in something as seemingly simple as collecting food. As a result, until they can rest, their energy reserves are a bit depleted--meaning that the energy that squirrel exerted chasing after what turned out to NOT even be food, might have just made it a bit more likely than it could end up as a hawk's lunch on its way to try to find real food.
I know you just wanted pictures, and you got some good ones! And I certainly don't want to sound like I'm scolding; I hope it's more education. Wildlife Photographers sometimes get a pretty bad rap from other wildlife enthusiasts because of a few unethical sort who will do ANYthing to get a great photo. I tend to go to the other extreme: I believe that if you want to do wildlife photography, you should really educate yourself about what is and what isn't, okay to do. Do nothing that disturbs the animals, causes them distress at all--instead learn their habits and behavior and spend the time it takes to wait it out for THE shot!