There are different ways to handle badgework with a multi-level troop. With my Daisies and Brownies, I have pretty much focused on the Brownie Program but have related the activities to Petals where possible. Since Daisies is a two year program, I have no problem with it taking two years to finish the petals.
At our last regular meeting we worked on two petals: Responsible for What I Say and Do and Using Resources Wisely. For the other petals we did this year, I picked a petal that worked with the Brownie badge; this time I picked the Brownie Badge because it worked with the Petals.