Why is my 13-year-old Yorkie suddenly aggressive and biting me?

Question

I have a 13 year old Yorkie who has been a great, sweet dog but all of a sudden, maybe in the last year has become very aggressive, mostly with me, the owner. If he's on our bed and I go to reach for something over or near him, he'll sometimes attack my hand and has bitten me numerous times, not sure what's going on. Pet's info: Dog | Yorkshire Terrier | Male | neutered | 11 lbs

Jennifer Summerfield, DVM CPDT-KA · Accepted Answer

Poor Reggie! It's unusual to see aggression appear this late in life without an underlying medical cause, so I would be very concerned that something may be wrong. Reggie may be feeling sick or in pain for some reason, or he may have a neurologic problem such as a brain tumor causing this out-of-character behavior. I would recommend taking Reggie to the vet for a full exam and diagnostic work-up to help determine what may be causing him to act this way. Depending on what the underlying problem is, it may be treatable with medication.

Why is my 13-year-old Yorkie suddenly aggressive and biting me?

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