Sorry to bump this thread, but I'm having similar problems and would appreciate any advice.
I have an 18 month old, white GSD. We rehomed him when he was 9mo, and although he knew sit and come, he new little else. He now knows sit, down, flat, come, stay, catch etc..
Now my problem...
Although he knows the actions, his reaction times are poor/appalling. He will do as he is asked but I'm sure I've seen quicker tortoises react. He'll sit but slowly. Lie but do it slowly etc etc. He shows no sense of urgency. If he was human I'd be asking what kind of illicit substance he was smoking!
Once in the position he'll hold it for 10 seconds or so, and then "relax" by slouching if in the sit, or lying on his side if in the down.
I'd really appreciate any help here in retraining ideas.
I've got a Cavalier KC pup thats about 3 months old, and have no problems with him. He couldn't be happier to perform and please. I just wish Sam would follow the pups lead!
Thoughts and advice will be very much appreciated,