My battle wolves can't restore their health.
I wait some real hours, but health stays on the place and i'm use potions or hot spring (once of day).
It bug or new update? :0
It's probably a bug.
You've actually used health potions? If not, try doing so. If you have try once again on one wolf.
Also, clear your browsers cache, history and settings.
If possible, also try another browser and/or device