<human>: Summarize the given text in a few sentences.

Hi everyone,

 I just found this sub and I believe you guys might be able to help me.

Me and my malamute, Rover, just recently moved from Mexico to a small town in Massachusetts.

For a while everything was fine but recently Rover's behaviour has taken a turn for the worse as he has started to become aggressive towards me. He has bitten me twice already and yesterday he tried to again; there was no provocation from my part (I was only reaching for something that happened to be above where he was lying around.

I believe this might be linked to his new mania of chewing his tail. He has ripped off almost all the hair from most of his tail.

I took him to a vet but they didn't really know what was going on. They gave us antibiotics and steroids for the itch, but he has continued to lick and/or bite his tail, even with a cone of shame on.

 He goes out for walks at least twice a day but I'm gone pretty much all day and he stays alone. The funny thing is that the chewing occurs mostly when I'm home (one of the bites was as a result of me trying to make him stop).

What can I do? Thank you in advance for your advice.
<bot>: My dog has bitten me twice since we moved from Mexico to Massachusetts. I believe it could be related to him chewing his tail, but I'm not sure. Need advice.