I am having dog park issues with Diego. Before the winter we went to the dog park 2-3 times a week for about 3 months.. park is closed in winter because of the lake in the middle.. now that its open we started going again.. the past two time Diego would be normal playing/sniffing dogs, and then all the sudden he goes up to a random dog who did nothing to him and start growling and showing his teeth and acting like he was going to bite the other dogs neck(not friendly at all, very aggressive).. i had to grab him and pry him away..
the first time i was confused and thought it was just a dog he decided not to like, but the second time (which was on a different trip to the park) i decided no more dog park.. the two dogs he went after did nothing to him, and when he starting going for their neck they tried to get away and went to their owner.. he would not leave them alone until I physically picked him up.. and once i had him leashed he wanted to keep going after the dog.. I am so confused on why he is doing this, i feel like something must be wrong with him! When we went before winter he never had any problems with other dogs (never growled or snarked at a dog).. what could be the issue here??
the only change that has happened since winter is we have a second dog, who he gets along with great.. I'm not going to take him to the dog park anymore, but I'm really confused on why that happened??
I wanted to add something I just thought of.. He has been having less of an appetite lately?? Not really wanting to eat his food and only eating because he doesnt want Meeka to have it.. Any relationship between the two things??