Hi there. Many, moons ago I had a brownie troop of over 27 girls, which was already too many; then the leader of the Juniors had to quit due to illness. I took over both troops and boy was that a job! (Right in the midst of cookie sales, no less!) Just because you have two different troops doesn't necessarily mean that they have to work on the same things. There are some projects that may be suitable for both groups, while others may not. Perhaps as an incentive for the brownies to earn a badge they can mentor some of the daisies with certain projects and such?