I don't roll it because I found that working with dog food is a very sticky and messy proposition. I make 8 slices out of a can of the R/D. I then cut 6 pie shaped pieces into each slice.
Bake them on parchment paper (best way not to have them stick!!) at 350 degree oven for 37 minutes.
I calculated it at about 5 calories each. I started making these for my chunky monkeys.
All of my pups LOVE these treats!