I am going to loan you my 125 lb German Shepherd. (He has decided that he only sleeps on the couch which is where I want to sit and now can't.) LOL
Ebay has pepperspray.
http://www.ebay.com/sch/i.html?_trksid=p5197.m570.l1313&_nkw=mace&_sacat=0
If you buy pepper spray, buy more than one can. Plan on using up
at least one can practising with it, learning the spray pattern, etc.
A friend of mine travelled alone frequently with her dogs. After staying at a less than desirable spot, she decided to get pepper spray for self defence. She kept it on her keychain so it was alway with her.
So, she's staying at a motel and taking her two Shelties out for the last walk of the evening. On her way back to her room, a sketchy looking guy approaches her, so she gets the pepper spray out just in case.
He gets closer, shows a knife and demands her money. She's terrified but she has her pepper spray! She raises it, pushes down on the top and...
Sprays herself on the hand but enough gets into her face to blind her and take her breath away.
Her dogs had been going nuts barking at the mugger but when she started reeling around and gasping for breath, one of the dogs turned around and nailed her on the knee (re-directed aggression). Dog was not kidding, the punctures around her kneecap were over a quarter inch deep.
Fortunately or unfortunately, she did not see which dog did it.
The mugger? She recalls him sort of standing there, apparently stunned for a few seconds, then running off while screaming with laughter.
She ended up going to the ER, where she told her story to a series of medical personnel and hearing hysterical laughter in the distance.
She herself laughs about it now and she even still loves both dogs.
She says herself that she was successful at repelling the mugger but it's not the kind of success she ever wants to repeat.