Snails! Can my plants recover?

So I found my plants today with some evidence of snails eating the leaves, and the bastards were sitting in the dirt next to the plant so I made sure to kill them. I plan on rigging copper wire to stop them and I already have a fence around my 5 gal bucket. But my question is can the leaves recover? A few days ago my plant was slow growing and appeared to have a minor nitrogen deficiency. I fed it some nitrogen in water, diluted of course, and some cow manure 1-1-1 that was decomposed abit on top if the soil. It has rained recently, and the plant showed some black tips on the new leaves now, but the old leaves look better than their old yellow. The snails appear to have eaten the cotelydons but they could have fell off. But anyway, can my plants leaves recover? And can the new leaves recover also? I think the snails ate part of those as well.

The leaves will not regrow where the snail bit them but the plant itself will recover and put out new leaves and shoots. You can also partially empty a beer can and then bury it with the top up and exposed and the snails and slugs will go into the beer can and drown in the beer

I was wondering if that was the case, but damn I guess so. I was hopeing it wouldn't affect any new growth for the young plant, especially on its new leaves with five leaflets. And that beer can idea sounds really good!