In a panic disorder, the initial panic attacks occur

Panic attacks typically begin suddenly, without warning. They can strike at any time, when you're driving a car, at the mall, sound asleep or in the middle of a business meeting. You may have occasional panic attacks, or they may occur frequently.

Explanation:

Hope this helps

i think she would gain 18 grams

again, you should probably take him to the vet. goodluck