how long ago was it done?
i know with my hubby being a tattoo artist you can tell when it was fresh and when it was done by the skin, so i mean if you have had him since he was a pup and you know its not there before and it is now, i would simply call then and ask for a copy of all medical records becuase your lawyer wants to take a look at them and begin building his case, you may feel weak or a littel scared saying it to them but say it and then when they say hold on etc etc
or come by and get them stay strong i mean after all they didnt pay for your pup, they didnt pay all your vet bills, and food ,etc you do and you didnt ask for this thing to be on him, if saying you are taking it to a lawyer and they still wont admit it, then change vets by all means but they should fess up, mistake or not, they can easily refund you the neture fee or something,
i mean thats ridiculous of them, and i am mad for you
definately dont let it go and tell as many peopl as you want to
thats crazy poor pup, at least you cared for his diginity by covering up his base balls with well ummm baseballs
let us know what happens