Rosalind said:
I learned most of my chicken-keeping skills from my PA relatives, unfortunately, so they were not much help with the question, "How do I haul yucky chicken litter through three feet of snow to the garden?"
I am not from Massachusetts but I
am originally from Pennsylvania

, and if you don't want to stack it elsewhere and wait for spring, I can suggest three pretty good ways of hauling your chicken litter across the snow to your garden. Choice depends on how much litter and how yucky. All work well for one or two stall quantities of horse cleanings (you do NOT want to have to use them for daily cleaning of a 16 horse barn, ask me how I know

):
Option 1: if snow is only a foot or so deep, and/or a path of about that depth can be shoveled or shuffled thru the drifts, tie a couple feet of stout rope to 1 handle of a big plastic muck bucket (hand to have around anyways - note that walmart/toysRus/etc often sell them as storage tubs, in silly colors). Put pooey litter into tub. Pull it to garden, walking backwards so's to notice in time if it starts to tip (if you have to make >1 trip, you won't have tipping issues once the first run has flattened a track).
Option 2: Get a plastic 'molded toboggan style' sled, from store or steal it from some kids

You want the kind that looks sorta like a rowboat with no real sides. Make sure it has pull rope attached. Shovel litter into empty feed/mulch/garhage bags, bunge them onto the sled, tow out to garden.
Option 3: Get a big plastic tarp with no holes in it. Pile litter on it. Fold 3 sides up and around litter and secure well enough that litter won't blurp out on the way. Pull out to garden. Note that this method does not work well thru narrow gates, around corners, over very bumpy drifts, or in a high wind -- however under good conditions you can move more litter in one trip than with the other methods.
Mind, *my* chicken poo is getting stacked in a circle of fencing near the coop to wait til spring, I have a shed attached to the barn in which to compost winter horse shed cleanings, and they live outside so I seldom *have* stalls to clean these days
Have "fun",
Pat