"Riverbee, you bring up an item that I have been concerned about, but don't know how to do, and that is "just made sure they could defend themselves". I figure my location is in the middle of a commercial bee yard, so for the first month or so, I'm gonna be worried every time I make the trip out there that my hives have been robbed. Any advice on defense."entrance reducer. use an entrance reducer. robbing screens also work great.
when i create nucs or buy nucs, (usually in the spring) i use the smallest opening on an E/R. if i have done a divide in a deep box, i move it and also a nuc created from my own hives, and again use the smallest opening. as they grow, i open the E/R. package bees the same. haven't done package bees in sometime but always started off in a deep hive and E/R at the smallest opening. when to open up a little more? when you see 'traffic jams' at the front as they build up and grow. i have only used robbing screens in a dearth, stronger hives robbing weaker hives, and also if i think i might have a problem when i take honey off in the fall. sometimes i have just popped the lid off (outer cover/inner cover) all the hives or strongest hives when robbing was occurring to try and isolate the robbers, and when i figured it out the stronger hives received the robbing screens. sometimes all hives received a robbing screen. for the bigger hives it slows them down and for the smaller/weaker hives, more defense.
this is and can be regional and weather/ nectar source related, or how close you are to another beek, and how many hives one keeps. there are so many variables on what we can get away with when dividing hives, creating nucs, hiving packaged bees and also depends on how many hives you have, how strong they are, are we feeding or not to leave them in the same yard with bigger stronger hives. i have learned for myself to move my nucs. (i normally keep about 6 or 7 hives now). sometimes i can get away with leaving a divided deep as long as there is a good nectar flow. if there is not i move out.
i am rambling..........
best bet is to use an entrance reducer, smallest opening, and be observant pappyrick!
if you see bees flying all over the nuc/hive up and down looking for a place to get in, and fighting bees on the landing board, sure sign of robbing. it's sort of frantic flying behavior and much different than bees that are in flight or first flight and orienting to the hive.
hope this helps.