what about local group obedience training session, as this can be cheaper than a one on one trainer.
Am I correct in saying he is about 18 weeks? At 4 months of age, try and give a couple of 20 minute walks a day or 1 walk and some great ball play and buy a treat ball for him so you can put his kibble in and he has to work to get his food - this really tires them out and he won't feel frustrated and will sleep.
With the yawn - as far as I can tell it is simply a yawn, my Harry, a 3yo GSD still does the high pitch yawn, just opens his mouth wide, yawns and out comes a high pitch squeal.
if your GSD is eating and eating and eating and losing weight - please consider testing for EPI.
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