I just tested the water. Nothing is off. Ammonia - 0, Nitrite -0, nitrate - 10
If it was a true NPT without a filter, then I think doing bigger water changes might cause an issue. Not really sure about that. I know 6 bettas wont have that bad of a high bioload but I do have several trapdoor snails, 2 rabbit snails, nerite and 2 plecos in there and they are all high poopers. I might actually do less then 25% a week. I use a 7 or so gallon bin and I fill it 1/2 way - and I usually make 2 trips - so about 6 gallons a week.
Yes sometimes a Betta can become quite large and round and not have raised scales but there are also times when the scales can slightly raise because of this bloat and they survived because it was not Dropsy it was simply something that had to pass.
That's kind of what I am hoping for as she eats EVERYTHING. However, I am not really optimistic since I know pineconing is almost always because of dropsy.
She could be eggy but...I dont think that would be enough to cause pineconning.