2 springs ago, we planted a row of Emerald Green Arborvitae. The first year they all did well. Here is a comparison photo showing 4 months after planting and 16 months:

(Note: I did add another layer of landscaping timber to the planter)

Last year for some reason--either over watering or I accidentally got some lawn fertilizer on them--all but one became inflicted by brown dead branches, some worse than others. They have all mostly recovered except these two on the end:

Will these ever recover? If so, how long will it take? Should I replace them?

Another problem I am having is it seems that some of these trees are loosing their shape and the branches are falling all over the place:

After the browning incident, I started giving them a weekly dose of fertilizer with miratic acid as someone told me this will help. Do I need to trim these to get them back into shape? Why are the branches falling away from the main trunk?

Lawn fertilizer should not have had any browning affect, unless it was weed & feed type formulation or you really overdid it. Most lawn fertilizer has a high nitrogen content and would cause the arbs to become even more lush and green if you were watering them as much as you say.

That brings us to my last point.......exactly how much and how often did you water them? That browning looks more like drought stress than much of anything else (they don't call these swamp cedars for nothing!)

And the drooping foliage is most likely due to snow loads.