I think u should make copies of that letter & bring it to the police & if the police do jack, just give the fbi a shout & see what they have to say about it. I also subjest u get letters from ur neighbours stating ur dogs r nice & love children & wouldn't attack & make copies of ur notes about all the other things shes done, like stol ur dogs... it'll help in ur defence... & also mat save ur dogs lives from being put down because of her.. try & see if u can get a note from her husband... I think u said he was a good guy, right?? Also take photos of ur yard set up & the dogs chjains & the lock on the dog pen, etc.

Oh & make it quite clear to the cops/fbi that this "I am afraid that your dogs may get hurt." a threat & it is a crime!!!!!!!!