keep your dog on a leash. or else reinforced U-lock.

Bitch about unleashed dogs.

I have had a number of experiences with unleashed dogs.
1) high school. I was biking to a friend's place to go swimming.
Somebody's big-dog puppy was loose.
It chased me.
I didn't want to kick a puppy.
So it managed to get in front of my front tire.
I crashed my bike and my bike and I both got mangled.

2) biking to work outside town, a pit bull frothing at the mouth chased me down.
My boss and I had little chitchat with the owner. My boss had already negotiated with that dog, with a shotgun loaded with rock salt.
Just remember 2 words. Dark chocolate.

3) I had some moron's family pet dog try to savage my leg on the Iron Horse Trail.
I provoke all the same instincts in a dog as a running deer or antelope while on a bike.
Its teeth skittered across my jeans.
I now carry a U-lock with cast-iron T-joints reinforced on the joints. Makes it hard to steal the bike. Other uses too.
The big square iron end cap is minimaxed for dogs and sheet metal.
And I have NO sense of humour about being bit.
If you are too stupid to keep your dog leashed, well, it looks like you'll soon be in the market for a new puppy.
It only takes one swing.
I'm not extending the benefit of the doubt to a dog that is running me down, next time. I cannot afford to.
If the dog pulls my face off, your heartfelt apology and obvious idiocy is no consolation to me.
It's too bad that I am not legally allowed to express my displeasure with the owner, who is at fault - the dog isn't to blame.
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How to:

Get 3/4" cast-iron T-joints.
I don't like welding, since the heat tends to damage the lock mechansim.
I read something about some quasi-gel epoxy.
Grinding out the threading is a serious bitch.
It is tedious with a hand drill and grinder.
Notice the threaded insert in the T-joints.

This layout makes breaking the lock hard. The liquid nitrogen- to - joint trick does not work well.
I lost my key once, though, and proved I can cut thru such a lock in 2 minutes with a hack saw.
I imagine it would take very little time with a grinder.

The main problem with this beast of a lock is carrying it.
The mod won't allow it to mount in the kit that comes with the lock.

I am not scared animals with this lock.

Keep in mind that recumbent bike puts the rider face-to-muzzle with a large dog.
And is not a good position to kick from.
Plus the bike is too low to hide behind.

Just keep in mind that a car still wins, being a ton of steel.