How to clean cooking oil off a steel fence

I have used that mixture with good success. Make sure to wipe down everything that the dog might have come in contact with, and I mean everything. Floors, walls, trim, doors, etc. You might need to repeat the procedure a few days later.

The skunk odor tends to linger quite a bit and you will find that it gradually reduces in intensity over time but is still evident. Anytime your dog gets wet you smell it, likely for months!

If it is really bad and does not go away you might opt to bring in a professional cleaning company who will have stronger chemicals to deal with it.

The less water the better, to a point. Excess water will weaken the mix. At some point in the other direction, there is not enough water for the hydration process(around 0.25:1 water:cement). In general though, to have a workable mix, there will be enough water for hydration. Use as little water as possible to make a workable mix, around 0.45:1 is fine. Don't use mortar for bulk fill, it's a waste of cement. The gravel in concrete is just filler, saving cement.

The concrete you mixed is sort of the standard DIY ratio, I don't know why it didn't work. While 0.5" gravel is a bit small, it can't be the reason for crumbling. Perhaps the cement was old? It may have absorbed enough humidity to partially hydrate, but not so much that it bound together.