I would agree in general, though I also think sometimes multiple failures happen at once. They may well have a system, which is LW under normal circumstances and that’s fine, and visitors are introduced in the presence of LW who can reassure the dog, and that’s fine, and that’s worked to this point. But then we have a situation where LW is out of commission in a way they usually aren’t, so LW took the step of restraining the dog because the usual protocols that work couldn’t occur, but then there was a failure due to the husband (who may well have been confused about why the dog was restrained, because that’s never been necessary before).

The problem is that there’s so few details in this letter, I can’t draw any solid conclusion; there’s just supposition. Maybe LW has a dangerous dog who has bitten people before. Maybe this was the first time. Maybe it only happened due to multiple failures and will never happen again. Maybe it is likely to happen again. Maybe it was serious enough to need to be checked out. Maybe it wasn’t a big deal and LW’s daughter did something resentful because she got forced into helping. I have no idea.