I have two hives, started both from packages last spring. One hive went into winter stronger than the other (in terms of numbers). They were likely equal in stores. They are both in 3 medium boxes. I checked on them today quickly to see where the clusters were (it was pushing 30 degrees which is a warm day for us right now). In the first hive - the one with fewer numbers - I couldn't see the cluster, but I could see a few bees and still lots of honey in that top box. I closed up quickly.
In the second hive - the one that started with more numbers - the cluster is clear to the top and on the top cover. I added in about a cup of sugar, mountain camp style, on top of two strips of newspaper placed on either side of the cluster. Did I do right? I assumed that this hive has eaten through its stores based upon its location and larger size. And how often should I check to see if they have eaten the sugar and need more?