I don't see such problem with cheheom souls. What is more I think it's not normal when u get 1 exp ring in 100 dungeons or 0 in 20 dungeons like @Chrizz
Nevermind I will try to get 90 lvl (I have 83 lvl pet) and then evolve it. Maybe same day I will get 90 lvls and it will be good time to get 100 and evolve it again.. xd
Why drop ratio of pet experience rings is so low? I think it's unfair that it used to be so easy to have them and now so hard. That's too much of a difference and this is off-putting for new players. I think it should be balanced.