I just fed my baby her first f/t mouse (she has been eating live up until now) and she took it without a second thought! I'm so proud of her But almost every other mouse in the other bags has some blood coming out, and when I poked them they weren't frozen rock-solid like the one I thawed to feed her. Is it still ok to use the other ones? I have them at a colder freezer setting so they'll freeze up better.