So my 5 month old Kota does not like to play with other dogs. When we go to the park, he kind of stands off by himself or wants me to throw a ball for him. But he just doesn't really pay attention to other dogs. When other dogs approach him wanting to play and are "rough" or jump on him or even kind of nudge him, he will bark and nip until they leave or even chase them off. Today we walked to the park with our friend and her two giant Great Danes. Kota walks right next to them and all is good. They all chased the tennis ball together and generally got along. After about an hour at the park one of the Danes threw his leg over Kota and he about tore the Danes head off. As long as there is no major contact he is ok with other dogs. Then a lady came in with a playful lab puppy. The other dogs all charged the fence to check out the "new guy", but not Kota, he couldn't care less. Then the lab puppy approached Kota and Kota chased him off as well.It's like he doesn't know how to play. He is ok with kids, he does bark at them until they let him smell them, but he scares them and me as well. No issues with adults at all. He is signed up for training which starts tomorrow. Any advice? It's kind of embarrassing at the park.