(You're trespassing!)

• Dog warning
• ''I'm mad!''
• Sound of a peeved poodle
• [Return that bone at once, or I shall bare my teeth and yip!]
• Lab's warning
• "Stay off my turf!"
• Reaction to a stranger
• [This is very annoying]
• Terrier's audible warning

Wiktionary Word definitions in Wiktionary
alt. A growl of anger or disappointment. interj. A growl of anger or disappointment.