JMHO
about feeding weeds....
--- I feed lambsquarter all year,[from last frost to killing frost] but it is always fed with the other weeds, my rabbits will eat what they want and leave the rest-- it is important to have enough other things available to them so they can move on to another type of plant if they have had enough of something. I feed kale [usually dino-kale [lacinato], or collard] along with the weeds, these are always safe for them to move on to since they are very used to eating these most of the year] In the early spring when weeds, and kale are first becoming available I start out with about 1/2 a leaf of kale for each rabbit [about a 3" x 4" piece from the over-wintered plants] for a few days, then i gave them twice as much for a week, -- after that I give them all the kale they want, [or what I have available]. -- as weeds begin to become available I give each rabbit a few - and by the time weeding is a major chore-- they have become used to them to the point I can load each manger full and they choose what they want to eat. - each afternoon[or evening] before I feed more greens, I clean all uneaten weeds from the manger,[there is almost never any kale left] I feed these to the sheep and then give the rabbits the freshly pulled weeds, and more kale. There is always a little grass hay, straw, or corn stalks available to them at all times [long stem fiber]. Nursing does and their litters get a scoop of pellets, or some grain/ boss mix. [or at times ,cooked potato, carrot, J. artichoke, or sugar beet] to provide enough energy for good growth.-- JMHO---