My maltese Benji is 11 mths old now. He is neutered at 6 mths and a very nice obedient puppy and trained - sits, fetches, rolls etc on command. Recently since 1 month he has started barking at strangers/ guests and biting. He bit my friend and brother just above the knee. Even though it was only a small scratch over the dress it scares us. 2 days ago when my daughter was holding him and sitting, my husband was checking his eyes for tear stains - he lunged forward and bit my husband's face- on the lips. Luckily it was only a small nip. Immediately my daughter put him down and I said no firmly. I gave him a time out in the guest toilet for 1 minute. After that he appeared to be apologetic. Don't know why he has started behaving like this.