Anxious Maltipoo puppy

[Snehanand Sinha]

I have a Maltipoo male puppy 6.5 months old. He is increasingly getting more nervous and resource guards his food, bed, and at times anything and everything. When anxious he tends to be stiff, have a blank stare, lunges even when unprovoked, and at times gets around to bite too. Fortunately, he backs off when you are firm and stay in the same place. This behaviour is more pronounced between 8pm and 7am. During the day he is far less anxious. Please recommend steps to take

[Adrienne Farricelli]

Hello,

Thank you for describing the situation in such detail. What you’re seeing is concerning, especially given your puppy’s young age,so it’s good that you’re seeking guidance now.

A 6.5-month-old puppy showing escalating anxiety, generalized resource guarding, stiffness, hard staring, lunging, and attempted bites suggests a combination of fear-based aggression and impaired emotional regulation. The fact that the behavior intensifies consistently in the evening and overnight is also clinically relevant.

A few important points and recommendations:

 Safety and management come first
Until this is properly evaluated, avoid situations where people are approaching him around food, resting places, or valued items. Do not attempt to “test” or challenge him. Management tools (leash indoors, gates, predictable routines, controlled access to resources) are essential to prevent rehearsal of aggressive behavior.

Do not rely on firmness or confrontation
While he may back off when you are firm, this is not a sign that the behavior is resolved. More often, it indicates suppression driven by fear. Over time, this approach increases the risk of bites that occur without warning. Avoid verbal or physical intimidation.

Resource guarding at this age is suspicious
Guarding that is broad (food, bed, objects, space) and paired with anxiety and unprovoked lunging is outside typical puppy development warrants a veterinary behavioral evaluation, not just training advice.

The time-of-day pattern matters
Behavior that worsens between 8 p.m. and 7 a.m. can reflect fatigue, reduced coping ability, sleep disruption, or underlying anxiety disorders. In some cases, medical contributors (pain, gastrointestinal discomfort, neurologic issues) must also be ruled out.

Immediate steps you can take now

-Feed in a quiet, separate area with zero interaction during meals

-Remove access to high-value items unless supervised

-Do not disturb him when resting

-Keep interactions predictable, low-arousal, and brief

-Ensure adequate daytime enrichment and structured rest periods

6. Seek professional help 
I strongly recommend scheduling an appointment with a board-certified veterinary behaviorist (DACVB) or, at minimum, your primary veterinarian with referral to one. Early intervention at this stage can significantly improve long-term outcomes, but delaying treatment can allow patterns to consolidate.

Best regards,
Adrienne