[hazelrunpack]

Welcome to the board, gibby.

It's possible to fix this, but probably not by yourself. You'll need to find a good trainer experienced in handling aggression and resource hoarding--and you'll need to do your research to find one that's suitable. First get educated in techniques. There are a lot of online resources for that, but many of them are questionable, so do some digging. Get advice from your vet; look at credentials; check for online references and reviews on possible trainers; ask lots of questions of the trainers on your short list... Find a new trainer if you aren't satisfied with the answers you get.

In the meanwhile, though, you'll need to find a way to keep Henry from hurting your children. When he lunged at and bit your son, did Henry have something with him in his dog bed, or was he just lying there? If he had a toy or a chew, you may be able to temporarily keep things in hand by simply not allowing Henry access to toys or chews when the kids are around. Find yourself a good trainer and have Henry evaluated, then go from there.

This can be a tough nut to crack, but don't beat yourself up. Try not to overthink it, because you'll drive yourself crazy. Concentrate more on what you need to do to control it than why it occurred, because in my experience, the causes are many and not all under your control.

Many years ago we had a dog with aggressive tendencies and it took us many years and some lucky occurrences to get it truly under control. But I'm no expert. I freely admit it was a combination and sheer good luck and fortitude that finally won out.

Good luck and keep us posted, please!