I've tamed mostly outside: great harts, grizzlys, large cats, white wolves, bulls and retames of them and retames of bears, walruses, polars and so on. From 90-91,5 it went quite fast and then slower and slower and now I'm more or less stucked (0,1 - 0,2 / hour). A friend of mine at the same level is gaining alot and is taming the same stuff which I find very strange.
I've tried taming laza lizzies and hellhounds in Fire as well without any gain.
Make sure yoyr watching fir the message"this creature wasnt a challange" if you start getting a couple if those go get your young dragon an have him cook all the animald in the area. I have had to clear ice and a couple of my faviorite spots.because everyhting is my retames at this point buy now under a diffrent name.