Well, my daughter reported me and the dog to animal control, but she didn’t tell us until after she left town. I now feel I cannot trust her,

It's not clear if LW is mainly distressed that her daughter didn't tell her about the report to animal control. I can understand wanting a heads-up about that sort of thing. I can also understand why the daughter might want to avoid an argument with her mom about dog who is a "sweetheart and constant companion" who is also sometimes dangerous, and a dad whose cognitive abilities are declining in his old age, to the point where he can't keep the house safe for an afternoon. These are really hard conversations, but people of good will manage to have them and build strong relationships later.

Or, LW might be upset that her daughter told the authorities about the injury at all. Fuck that.