How Can I Stop My Havanese Puppy From Howling So Much?

Hello! We just brought home a 12-week old Havanese puppy last Wednesday. He is absolutely wonderful and incredibly smart…he doesnt mind his crate and sleeps 6-7 hours through the night without an accident. He feels completely comfortable with us (my boyfriend and myself) and is probably TOO attached to me since I have been home with him every day since he has been here. The only problem is that when we leave him in his playpen, he HOWLS and whines SO much. We leave him in there about 10-15 mins at a time, with us in the house and we have left for about 20 minutes since we got him and left him in the pen and we get back and we HEAR him howling and barking from down the hall by the elevators! He came from a farm in Connecticut, to downtown NYC, so the sights and sounds are definitely a huge adjustment to him, but he has been really good with everything else except being left alone. Anyone have any ideas or helpful tips?? I go back to work on Jan 9th and am scared to leave him.

How Can I Stop My Dog From Being Aggressive To New People And Some Other Dogs?

I have a 1 year old male maltese. Yes he is neutered. At home w/me and my family he is the sweetest dog in the whole world. But when he meets new people, such as my friends, he just goes nuts! He won’t stop barking at them and sometimes he even bites atthey’rere ankles and feet! We have tried giving the new people treats to give to my dog so he will like them but sometimes he doesnt take the treats. Then i have no idea what to do! I need help please! Also, he barks and lunges at most dogs. They’re are only about 2 dogs that he likes and they are a little yorkie (male) and a little havanese (female). You would think that he doesnt have a problem with little dogs, only big dogs. But theyre is another maltese across the street who is a little smaller than my dog is and he lunges and barks at the other dog. And the other dog isnt even doing anything! Please I have no idea what to do. We tried taking him to training for 8 weeks once a week but that didnt do anything. It just taught him simple commands like sit and stay which he already knew. Please i need some help. Getting a personal trainer for him is out of the question because my parents don’t want to spend the money. I need to know how to train him on my own.