I am also a member of the Vizsla group and they have had a thread of emails going around about some slight aggression issues. Here was the response from one that I thought might be of interest.
Last year we had a really good meet-up event at the Lee Mannix center for canine behavior. Can't remember if we met there or not. Lee had some great insight but my key takeaway from the event was how significantly food effected aggression. We were starting to see some slight signs of aggression in Mookie, our second V and listened intently when Lee described how 80 to 90% of aggression issues would be resolved with the right diet. We switched from Eukanuba to Kirkland's chicken and rice (which has no red protein, soy, corn, sugar, or dyes) and our mild issues with aggression went away. None of our 4 V's have an issue with aggression at this point and they love the food and are very healthy. It is also wonderfully cost effective at $24 per 40 lb bag (which is nice with 4 V's and two other dogs). It has a very high vegetable content, which Lee also recommended, and we have been very satisfied for the last year on it.
We are an Austin meetup group that loves Weimaraners. We are eager to meet other Weim owners and lovers in and around the Austin area. We meet at Austin dog parks and other dog friendly places. Our dogs enjoy playing together, and we enjoy talking about our dogs.
We also want to extend a welcome to owners of German Shorthaired Pointers (GSP). We know that there are some GSP out there (indeed one, Henry, has already been welcome at our meetups), but there is no GSP meetup; and that Weimaraners, GSP, and Vizslas are all cousin breeds (and there is already a thriving Austin Vizsla group). So, it seems to make sense. Perhaps we will have so many new GSP members that they may want to start a separate GSP group, but we are not there yet.