[Mjohn32210]

I have a 8 month old yorkie that is a great dog.....

Today we took him and my other puppy to the dog park and had some issues..(don't think it matters but it is a pitbull, and please, this is about my yorkie, I have done my research on pitbulls and consider myself a responsible and knowledgeable owner.)

Moving forward, I have been taking my yorkie to the dog park since he was roughly 4 months old. We go pretty regularly roughly 3-4 times a week if not more. We walk him at least once a day and twice a day if we don't go to the dog park.

Today I took both pups to the dog park and everything was business as usual until about 15 minutes before we left. He attacked, and I would say viciously attacked another young puppy #1 a female lab that is 4 months old. After that we separated them and moved on. With the yorkie on a leash he kept pulling to this lab puppy. Finally we decide to let him off leash and he again attacks another puppy. Second puppy was a 5 month old female husky. This one was worse then the first. After that we took him to the other end of the park with our pitbull puppy. The yorkie and pitbull are fine together, like 2 best friends. The lab came to the end of the prk we were at to play with our pit bull pupand the yorkie again went to attack. 3rd time was too much excitement so we left.

My question is why does this happen all of a sudden.. He was never like this until today.

Background info if this helps at all or matters:
Been fed blue buffalo since day one and we recently switch to taste of the wild.
He was fixed about a month ago.
Only thing I can say is about 2 weeks ago he started getting nippy if you try to take something out of his mouth. And more vocal while playing with our pitbull puppy. ( pit bull is 15 weeks and already fixed and is a male.) the pitbull is very submissive to the yorkie so there is no issues between them. They eat together, pretty much do everything together except when they are in their own kennels.

If there are any other factors or questions please ask.

I need help ASAP, I don't know how to correct or what has caused today's issues. Any help would greatly be appreciated. Thank you for taking the time to read this all over the place post..