Do not punish your dog for toileting in the house. This will make them more anxious.

How often do they go outside?

I would remove the puppy pads completely and take them both out to toilet every half an hour, and praise once they do it outside, and completely ignore them if they do it inside (unless you catch them in the act, do a quick "ah-ah" sound and put outside and praise when they toilet outside).

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I OWN A CHOCOLATE ROAN COCKER SPANIEL
RIP David xx Run free at the bridge. Love you always xx 19th February 2011
RIP Jack and Mickey xx Run free at the bridge. Love you forever xx 20th June 2011