adopted a GS mix

Question
We adopted what appears to be a White German Shepherd with possibly some Husky in him. Do you know anything about WGS. I know they are not recognized by AKC. We got him at 18 months. He is now 2 years old. The family who had him was neglectful, but not abusive in any way. He is great with kids but appears to have OCD, a mild hearing loss, and barks like crazy...especially at cats. We have a female Australian Shepherd who is about the same age. They seem to get along well most of the time. The hardest part is walking him. If he sees a cat, he goes crazy. Any help would be appreciated.

Answer
Not much I can help with on the rest, but a head collar might help with the walking.  The leading brands are Promise,  Haltie, and Gentle Leader.  They have a strap going around the dogs nose looking something like a muzzle.  They work by pulling the dogs head around.  No other way gives you such great control with so little force.  The prong collar is now a
dangerous relic of value only for its macho looks.  Do not consider using one
without hands on instruction from somebody with plenty of experience with them.