First thing is to neuter him. It takes 6-8 wks for the hormones to level out after. There is no fix that works for as ‘ll dogs as they are individuals. What works for one may escalate another. I dont know your family but given the breed and the tiny size I suspect he is spoiled, lol. While waiting to see the specialist restrict his privileges. Do not carry him around, do not allow him on furniture unless he is invited up. No bed sleeping. The idea is to reduce his “Pack status” He obviously has no respect for the humans in the house. He is still a baby and is very fixable at this age..he will escalate to push the limits of what h ed can get away with. The key is to find which method works for him. Some dogs do require physical restraint and intervention, while many simply require a change on behalf of the humans and their interaction.
