dogs barking  

Sometimes the collars work, sometimes they don't. There's no way to know without trying it.
A better solution is to find out WHY the dogs are barking so much! Are they left outside all the time? Dogs should never live outside all the time and is a major cause of nuisance barking. Most commonly they may bark out of boredom (give them lots of toys, rotate them so they don't get bored with them, play with them lots, and make sure they get enough exercise), "talking" to other dogs they hear (which they will more often outside), an excess of energy (exercise em more), or to warn others off their territory (and the yard is seen as their territory if they are outside all the time).
Find the reason why, correct that, and the barking will improve.

I would say ..bring them in for the night time..and let them out during the day..I think during the day there is more leniency for the dogs barking;)+ Happy Easer!

I have a little Dog and he barks only when he hears something
I have also heard of these Anti Bark Collors and have been told that they do work
The other thing that I saw on the TV is that you get a little bit of Water in a cup and when they bark you go up to them and make sure they see the Cup you tell them no 2 times and if they don't stop you throw the Water in their Face and you need to do that every time they bark, but please be careful you do not get it in their Ears and it is not to be a lot of water just a tiny Bit