I have trained, bred, groomed (bathing, nail trimming) and fostered German shepherds ... Training in both English or German , obedience training ( includes leash training and basic commands) Bathroom training.. If you want your dog to let you know when it needs to go out I'll have it ringing a bell ( I did this with mine) , food and toy aggressions ? Not a problem I can handle a very wide spectrum of training that is simple for both the dog and the owner... I use a tactic called Praise training if your companion does something correctly it will be both verbally and physically rewarded ( treats if allowed by owner) ... This tactic does not get used every time for correct behavior because your companion will then be doing these things just for the rewards which is not good, slowly easing off treats or physical gestures to just verbal praise . When your companion does something incorrectly it will only be told a firm verbal response , they need to learn the boundaries and limitations, repetition is key , ***I ONLY ACCEPT REQUESTS FOR DOG SITTINGS AT THEIR OWN HOMES***