I'm going to do my absolute best to be polite.With that said, I'm rescuing a dog from WORSE conditions than yours are in. So for everyone in the thread.. please remember.. there is worse. At least Sandman's dogs have water. Midnight cannot say the same for himself, and there's nothing I can do about it for now.
There IS something we can do for Sandman's dogs, though.
#1 you are going to need to find a place your dogs can stay in for several hours while you clean. Preferably a fenced area, or a room, and preferably supervised.
First things first.. clear out all the bowls/bedding/cardboard/newspaper/etc. Anything that can be picked up and moved, please do so. Spoiled, dirty things go in the trash (ie the newspaper and that bowl if you cannot thoroughly scrub the algae out--many types of algae are poisonous to dogs, and that algae is 'blooming' which is very dangerous). Things like bowls and toys go in a clean sink or bucket filled with scalding water that's loaded with soap, and let soak for a bit. When the water is at a temperature your hands can stand, scrub them CLEAN. Clean enough that you would not hesitate to lick it. If you cannot get the things in that condition.. throw them out.
Next please remove the 'beds' for your dogs. The cardboard one ought to be thrown away. Go buy a decently built 'house.' I don't know what kind. Perhaps another member (OC? I'll PM her and see.) can suggest good 'house' ideas, for building yourself or for buying.
Sweep up the area thoroughly (some sort of 'push' broom, I don't know what they are called, rather than the usual ones works best) removing all hay, hair, debris, and dirt. Next hose down the concrete--that IS concrete, yes?--thoroughly. Pull out some heavy-duty cleaning products (I would personally suggest a 2-5% solution of bleach, but other members no doubt have better suggestions) and CLEAN. Get down on your knees and scrub until you are tired. Hose it off, make more solution and scrub some more. Then thoroughly wash it off, letting the water run for a long while, and make sure to get the cleaning solution out of all the areas it may have gone on the ground near by. (Running the hose for a bit should do the trick.)
If I am wrong and the platform the beds are on is NOT concrete.. if you can't scrub it clean, get rid of it. Pave the area with bricks, lay some concrete there, something. You need something easily washable. If you get concrete, you are going to need to buy some easily washable plastic mats. (The kind they have in horse stables...) They will provide comfort, warmth in winter, prevent the dogs from hurting themselves on hard surfaces constantly, and be easy to remove and clean. Cut them down to fit well.
I don't know if the area is enclosed, but your next step is to enclose it. Something like the lattice you have near Indie will suffice well. Buy some more lattice, or planks, whatever works, and make it dog-proof.
Chain link fence around the ENTIRE area the dogs are will eliminate te need for chains, so I highly suggest you do so, but any kind of fencing at least 4' in height will work. I suggest 5'.
Your next step, now, after you have thoroughly cleaned and discarded things (Everything should be spotless now--the trashcan should be cleaned and moved somewhere else, and the beddings should be washed with soap and dried.) is to wash your dogs. They probably smell to high heavens. Give them a good wash with some soap specially made for dogs. Clean and dry their collars or buy new ones.
Now your bowls, blankets, toys, and brand new places for them to sleep should be clean and sanitary. As I said before, if the stuff is not clean enough to be licked, then it should have a one-way field trip to the trash can. Your next step is to KEEP the area that way. Every day poop should be scraped up and hosed off. In the thread previously linked, OC says that lime works well in getting rid of the smell. Use it. Bowls should be scrubbed thoroughly in hot water with some mild soap daily, because standing water outside tends to get things growing in it. Food bowls should be washed after each use in the same fashion. When toys get a little grimy, same thing.
Bedding should be washed when dirty or beginning to smell, and at the very least every two weeks.