First - ditch the pads!
Second - take the dog outside more often (I would say AT LEAST every 30 mins, if not MORE for such a small, young dog) but for less time each time. Does that make sense?
It goes like this: you take the dog out and walk about on lead for a bit casually. If she performs, you say a "magic word" (hurry up, be clean, busy busy, go squat, be quick) AS she is going. The second after she finished, step close to her and pop a SUPER TASTY treat in her mouth. This part is IMPORTANT. You only say the cue ONCE, AS she is going. When she is done, you go up to her - DON'T call her, or she may associate the treat with coming to you rather than with peeing. You need to be QUICK. And the treat needs to be ULTRA TASTY. It should be her F A V O U R I T E, and for now, you should reerve it only for these special times when she pees outside. Just this ONE change can make all the difference in encouraging a pup to go outdoors once they have formed a habit of doing it indoors... once they realise what they get for doing it outside, suddenly it seems very, very worth it to them and the new, good habit can be reinforced.
If she doesn't go, take her back in the house, but keep her confined or tether and watch her LIKE A HAWK. In 5-10 mins, take her out again and repeat the procedure. Be patient! It may take some time, but if you get frustrated it will only take longer. Give her a little more freedom only after she has just eliminated in the proper place, but still keep a close watch on her at first - keep doors closed etc so she can't wander off out of sight.
We only ever go for a walk here after the dogs have pooed and peed. There is rarely a food treat involved anymore - it's been replaced, sometimes by verbal praise and sometimes by a walk. It means we are less likely to have to carry smelly poo bags around.
If she has an accident:
- Don't punish her. That means you don't shout, clap, raise your voice, say "no", put her in a time-out.... None of that. At best, it is useless. At worst it makes her neurotic about toileting. How would you feel if you were actually SCARED about going to the toilet? Inevitably, at some point, you needed to pee, but everytime it happened something bad could happen? Anxiety and fear lessen the control of the bladder too, so a dog who is deterred from peeing indoors has even less chance of succeeding.
- Take her outside immediately. If you have managed to casually interrupt what she is doing, she may well have more to do outside, and it's am EXCELLENT idea to give her the opportunity anyway, just in case. Reward for anything she does outside.
- Confine her somewhere safe and out of sight while you clean up. A crate is good for this. This is not a time out or a punishment, it's just better if she doesn't see this part of the process. Some think that dogs actually find it rewarding to see you handle their waste, as they identify it so closely with themselves. It's very hard for a lot of people to clean it up without betraying any negative feelings of frustration or disgust, and it best if the dog doesn't see or pick up on this either.
- Take the waste outside. Use a paper towel or something to get a good bit of it to the place where you want her to go in future. When you have finished cleaning up you can let her see it and smell it. This will help encourage her to go back to THAT place in future.
- Clean the area thoroughly with an enzymatic cleaner. Most ordinary cleaners won't get rid of the smell, and some even contain ammonia which smells quite like urine. It is often scent that encourages the dog to go back and use the same spot again.
- Use the rolled up newspaper. Bash yourself on the head with it and chant "I must watch my puppy more closely in future".
Puppies learn to eliminate in connection with a substrate. That is, they get used to going on a certain surface and look for that surface when they feel the need. But the flip side of it is that they are stimulated to go by being on that surface. Ie. "oh I need to wee - must find grass!" but ALSO: "oh look, grass... hmm, I need a wee."
So if an owner has allowed the pup to pee inside, then the pup can make this connection with pads, or tiles or carpet, instead of, for example, grass or concrete. The more often the pup uses that substrate, the more ingrained this habit becomes. It may well be that she does not even feel she NEEDS to go while outside - because she "needs" to be on carpet or tiles, or in a certain area of the house, in order to be stimulated to eliminate. Simple vigilance, to prevent any more accidents, coupled with frequent opportunities for "good" toileting and very high value rewards when she gets it right will fix the problem. But you really DO need to be vigilant.