Trying to improve the soil in my garden. We use the deep litter method in our chicken coop. Can I use that - the poo and pine shavings together - in the garden? Or will the pine shavings hurt it?

Bark, raw wood, pine needles that are not decomposed will take time and the decomposers use lots of Nitrogen to do their work. Fine for large beds, gardens that already have lots of organic matter in the soil. You may run the risk of making your garden more acidic as well. I would add all the grass you cut and leaves you mulch as well as any chicken poo. Till it in and it will greatly improve your soil in short order.

you may have to adjust the PH later but it will certainly improve your soil

if your growing tomatoes you may not even need to worry about the PH

my neighbor has pines all along my fence that drop a ton of needles in my garden , corn isn't a good crop for me but tomatoes get huge
I have also used a bunch of wood chips that have pine in them.

you also don't even have to till , you can just layer it chicken litter and poo then leaves, hay, straw

it will break down like one giant garden size compost pile and it can also help keep the weeds down.

quack grass will still try and creep in , some people till a constant border a tiller width or 2 around the garden to try and keep the quack out.
pull the quack and get more mulch on top every time you see it.

I use deep litter pine shavings in the chicken coop and wood chips in the run. Since the run is exposed to weather the wood chips mix with poop and break down in to beautiful black compost. I have a hardware cloth screen I will go sift the big chunks of wood chips out and use the compost in my garden. This year I experimented with putting the dry, deep litter from the coop in the rows of my field corn and had beautifyl looking corn as a result. I used to compost the coop cleaning, but would lose so much of it into the soil where the compost pile was. Going forward, I will just use the deep litter pine shavings in the garden directly as fertilizer. I would think the chicken manure would neutralize any acidity that the pine bark could cause, but Im not positive.

Fresh chicken litter can burn plants. Aging or composting allievates that.

I use the deep litter method in my coop and run. I clean it out 2x a year-once at Easter and again around this time of year. It goes right into my gardens without any issues. I rake up all the pine needles from my trees and use them as organic matter in my coop throughout the year. After 6 months, the pine shavings/needles, as well as other organic matter we add is indistinguishable. I cannot produce enough compost for my needs, so I let the chickens help.

Thanks for all the advice. Glad to hear it won't hurt anythng.
Planning on cleaning out the coop before long and tilling it into the garden. Only thing left growing now is lettuce and spinach. Will probably wait till they are done or just put it in area's with no plants.
Then doing it again in the spring.
Plus I am adding lime to it later this winter.

as a test try an area you don't till ,doesn't have to be big 8x8 feet would be a good test plot . you might be amazed how much the worms will loosen the soil to get to that goodness.

I use straw bedding in my chicken coop. Wood shavings take too long to break down. When I clean the coop its just dry dust and chaff. I put it in the compost bin mixed with green grass clippings and spread it on the garden in the fall.

Pintail drake knows the garden inside and out