Composting dog poop

We have had 3 little dogs for about 8 years now.  To be honest we just ignore the poop. The front yard is fenced, and big enough so the poop fry's out, or decomposes where it sits.
We just got 3 German shepherd puppies. They showed up in our backyard two weeks ago, we made every effort to find the owners, with no luck. So now we have 6 dogs, and will have a great deal more poop.
It's not a problem yet, but I would like to get a system in place before it is.  The most popular answer online is flush it down the toilet. Not going to happen, no!  We have plumbing issues anyway, not to mention carrying poop through the house, no.  Then there are biodegradable poop bags, and expensive composters.  Sounds ok, but these dogs are going to cost us a ton just in shots, getting them fixed, not to mention what they will eat.  I need a free solution.
Idea one compost.  Far away from any from everything.  Never actually used, except to eliminate a mountain of poop. I will probably use old pallets, or wood, something I already have, mostly so everyone knows where to put it, and no one walks there.  I figured I will dump shredded cardboard, and wood chips, and soil on it now and then to keep it from smelling.
Idea two, get a large nursery pot, or old tank. Drill a bunch of hole in the tank. Dig a hole and put the tank in the hole . Then the same process as above. Put the poop in the hole, adding layers of wood chips, cardboard, and soil as needed to keep the smell down.  Again I will probably add some composting worms for good measure. I would probably make a lid for it, to help with the smell.
I like idea 2 best, except, digging our ground can be a challenge. Also we get our water from a well. We have almost an acre, so I would put it far away from the well, but worry it still won't be far enough.  I know this can be a problem even with the above ground method, but there is so little rain, it's less of a concern.  Or I could do method two with out putting it in the ground.
I'm looking forward to hearing what you think, and what you do. Thanks.

My suggestion would be to find an out-of-the-way corner of the front yard if that is where they poop.  Make that corner your poop compost pile.

With the german shepherds, you will need a big pooper scooper so you might think about getting a small shovel.

Once that compost is finished it would be good to use for flowers and shrubs.

Best wishes for making what ever you decide to do work out.

I have a friend who has many dogs. Many. They live in kennels.
He got a pole digger attachment for his tractor, and every so often digs holes in out-of-the-way places (also downhill from his water source). Poop gets put in a bucket when the kennels are cleaned and dropped in the post hole. The top half a foot or so is topped with the dirt that came out of the hole. Then he moves on to another hole. If your space is small enough, you could conceivably cover the partly-full hole with a trash can lid or something to keep smells down, if you have to.

I had a compost pile for dog poo (also had 3 GSDs) and cat litter on my farm.  Used a paper or corn cob litter.   With plenty of leaves, cardboard, and grassclippings there was almost no odor at all, it was much less an issue than you might think.   That said, my dogs are raw fed so they have fairly well-digested smaller BMs to begin with that don't have a lot of odor.   Raw poop tends to dry into not much more than bone dust pretty quickly.  

I used to collect and put all our dog poo into a worm bin, it didn’t smell and the finished worm casts were used to fertilise fruit trees.

I now use a big hole with a bottomless bucket inside the hole, drop the poos in and sprinkle some bokashi bran over it and some sawdust. The bucket is lidded and in two years, not had to dig a new hole yet.

The bran is relatively inexpensive and lasts for ages https://www.zingbokashi.co.nz/ensopet

Our local council subsidises the “zing” as part of their waste minimisation strategy.

Most people use it for their food scraps but I just bury scraps that can’t be fed to our chickens inside their run and after a few months, turn the soil over so that the hens can eat all the worms that have migrated into the scraps.

Jen, I like a lot of the ideas here, but my personally think this is a potential resource to be put to good use.  I would not use it for food crops (would berry crops be OK?—I just don’t know).  I was thinking that you might be able to use it as fertilizer for some type of tree.  Something like a modified willow feeder (or really whatever species you want).

EDITED:

Another idea would be to just compost the stuff and then use it to feed comfrey if you have or want them.  Comfrey makes a wonderful green manure.  You might even be able to add the dog poop directly to a comfrey patch without problems.  The comfrey seems to have no troubles with abundant nutrients and I don’t think you would have any of the parasite problems of using it directly on food crops.

Just an idea or two,

Eric