Great Dane Knuckling/bowing legs

Question
Hi, i have a 5 1/2 month great dane.  He came from a reputable breeder (she's been helping me through this process) she does all the health testings,etc. But, about 1 month ago both front legs began to bow/knuckling IN at the carpal area...causing his toes to point OUT-easty-westy type toes. *his carpa area looks like this* ) (  <---i hope that makes a little bit of sense. Anyway, he was orginally on Canidae All LIfe Stages-but, i admittedly was feeding too much. He was not over weight, but i believe it is what caused the knuckling/bowing.  Anyway, i immediately contacted the Great Dane Lady and ordered her HOD kit with supplements for knuckling/bowing legs. and switched him to Eagle Pack Natural. It's been almost One month on the Eagle Pack Natural 2 1/2 cups twice daily, plus the HOD supplements as directed. ......No Change. His legs are not improving. How long should it be before i see a positive change? (if this is in fact nutritionally caused of course)
Any advice would be greatly appreciated!!  

Also, his stats are 87lbs, 27 inches at the withers, lean...can easily feel ribs. He has not had a temperature, loss of appetite and does not appear to be in any pain. I can move and wrap the joints with no reaction from him. He plays normal and does not ever appear in pain.

Thank you for your time,

Your opinion is very much appreciated!

Answer
Tiffany,

I highly encourage you to do some research and find a Great Dane savy veterinarian who has experience diagnosing and treating HOD. HOD is VERY painful and needs to be treated with a lot of Rimidyl. There is also pseudo HOD which is vaccine related.

HOD is not something that can be fixed, in other words, once the dog/puppy has developed this, it is treatable but not curable. You also said that he plays normal. A puppy with HOD should not be playing. He should be crated with minimal exercise and minimal stress on the bones.

Like I said before, consult a veterinarian that will be able to lead you in the right direction. This is a serious disease and needs to be treated.

I hope this helps. Have a good one.