You know why I think potty training is so hard? Itís because we are constantly second guessing ourselves during the process! That part can be the most stressful.
I would wait longer if you plan to continue indoor training. Even if she seems like sheís already reliably potty trained, if you plan to use the potty tray long term when you arenít home I would spend more time on indoor potty. Unless she is older than I remember, it just seems like sheís only been home for a couple of weeks. If she is using the potty tray consistently and seeking it out and not having any accidents, then itís fantastic that she really gets it! Maybe someone else will give a better, more educated milestone but I think AFTER she is doing that, I would give it a couple more weeks, then start taking her outside.
The reason I think this way is because you donít even need to ďteachĒ outside potty really, if you have been indoor training then once you start taking her outside sheíll figure it out in a day. The problem is that once you do that, she will want to go outside all of the time and if you havenít mastered inside, it will be more difficult to keep it up. If you donít plan to keep indoor potty training for when you arenít home, travel, etc. then I donít see why you canít start taking her outside any time.
A lot of people do both at the same time, which is why youíre getting conflicting information. But the skills you are teaching her by indoor potty training will translate to outside much more easily than the other way around. I really think it will be faster and more reliable long term to focus on indoor first. I made mistakes and this is what I wish I would have done!
She will probably get the concept of potty training pretty quickly because Havanese are so smart, but I donít think thatís the same as being completely trained because thereís a developmental component. Iím not sure if you mean sheís 100% reliable in 2/3 of the house or reliable 2/3 of the time. Waiting until sheís 100% reliable in each stage is going to make training faster in the long run, even if it feels slower now.
It IS hard to find a good trainer, but sometimes your choices are limited by the people available or wait lists. It is impossible to get in with a really good behaviorist or trainer in my area without waiting several months. But, Iím assuming we are talking about basic puppy stuff, not separation anxiety or rescue behaviors. You can gain valuable support and information from a lot of trainers that maybe arenít as experienced if you can communicate well with that person and they are open. If you feel like you donít understand, be direct and honest about it or keep looking. Part of being a trainer, IMO, is to be able to communicate with and teach the family - members of which may have a variety of learning styles - as well as the dog. It is going to be hard to find someone experienced with indoor potty training. Focus on finding someone you communicate well with and is willing to learn about it. Send them to this forum! Then stick with that person so you can consistently follow through with your training plan together, and so you have a support person. In my area a lot of trainers have way more experience with large breed dogs. There are just more large breeds here, for one thing, and I think itís more common for people to seek out training for large breed dogs here.
Regarding my own experience potty training, I didnít expand my puppyís area into a new room until he hadnít had an accident in the previous room for probably a month. I donít think my experience potty training was particularly unusual, we had a few setbacks when he started marking and as we were figuring everything out, so I was cautious and slow. I wouldnít label him as ďreliableĒ until 14 months. That would have been two months after I started relaxing and he wasnít having accidents. Maybe if I had been less cautious I could have started expanding earlier, but there is no way he could have been reliably potty trained at even 8 months. He just didnít have the control. He still had ďexcited peesĒ at that age. Iím not saying that you should expect to have lots of accidents at 8 months, just that 3-4 months old seems really premature to let down your guard, even if sheís doing great. Plus, itís a lot less work if you know sheís well trained in 1/5 of your house than for her to be partially trained in 2/3. Keep in mind each consecutive area will be faster. So even if you spend a full 6 months focusing on your living room, itís not going to take another 6 months to then train her in the family room, if that makes sense. Itís a few days or weeks of vigilance while you generalize your potty training to a new area of your home, starting small and increasing the area. I chose to go slower for many reasons, including my own home remodeling schedule.
Thatís a lot of information, but I happen to be sitting in our vetís office for our 2 year check up and sometimes there are moments when you look back and these things are very clear