While this seems extremely fun for my dog (just one out of my three dogs loves the water hose) and me, it can get a little bad when I don't want to play and I just want to wash my car or water my plants.
A couple of months into my puppy's life we noticed that he would bite the water from the hose when we were using it, and while I did consider it was pretty funny at the time; I also noticed that he got a little fixated on biting the water and wanting to get wet.
My pup is what appears to be a mix of Boxer, Pitbull with a hint of Shar Pei I suppose (he's got a very wrinkled face)... he's the smallest of the pack (7 months), he shares our house with two female dogs, they are all fixed. He's really the only hyperactive one (even at his age more so than my other two dogs).
How could I teach him to not bite the water? The problem is that if he doesn't bite the water he'll start to bite the hose as I drag it.
I've tried to leave him inside the house, but he'll just whimper a bit and wish he was outside making a mess with the hose. I've tried to put him on a leash tied to a post while I do my stuff outside, but I get the same reaction.
So, I wouldn't mind it if he knew when to stop or not do it unless I allow it. I'm looking to see if someone has a training method or psychology I can use to try to correct this behavior; I've successfully trained him in many other things, but the hose is one of those things that just gets him going nuts out of control.
Not my dog, but an example of what's going on: