Does Level 109 have an opening cow?

No. The first decoded board is blank, including the teal singleton at r8c2.

What is the lower-row trap?

The source marks r7c5 red. The safe lower-left continuation is r6c3, followed by yellow r7c7.

The final successful cow lands at green r5c9, after the brown r4c4 placement.

Zoodoku level guide

expert 9 colors

Solve the blank 9x9 cow board with r8c2, r9c6, r6c3, r7c7, r2c1, r1c5, r3c8, r4c4, and r5c9 while avoiding red r7c5.

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Place the first cow at teal singleton r8c2.
Place the second cow at magenta r9c6.
Place the third successful cow at light-green r6c3, not the source's red r7c5 tap.
Place the fourth cow at yellow r7c7.
Place the fifth cow at pink r2c1.
Place the sixth cow at purple r1c5.
Place the seventh cow at light-blue r3c8.
Place the eighth cow at brown r4c4.
Finish at green r5c9 and confirm the two-heart leaderboard transition.

Colors in this level:

Pink, Brown, Purple, Light-blue, Green, Light-green, Magenta, Yellow, Teal

Avoid r7c5: the reviewed source turns it red and drops the heart strip from three to two before the safe r6c3 placement.

Start with r8c2 -> r9c6, then use r6c3 and r7c7 to separate the lower corridors.
After the lower lanes are fixed, close the upper rows with r2c1, r1c5, r3c8, r4c4, and r5c9.

Board notes 5 details

Layout: The blank 9x9 board has pink and purple across the upper-left/top, a broad brown center, light-blue and green on the right, and light-green, magenta, yellow, and a teal singleton across the lower rows.
Goal: Follow the nine successful coordinates r8c2, r9c6, r6c3, r7c7, r2c1, r1c5, r3c8, r4c4, and r5c9.
Opening: No cows or X marks are seeded. Open with teal singleton r8c2 and magenta r9c6; the safe third placement is light-green r6c3.
Danger Zone: The source's r7c5 tap becomes a red error X and removes one heart. Keep r7c5 out of the lower magenta corridor and use r6c3 instead.
Mechanics: White Xs propagate from valid placements, while the single red r7c5 mark remains as the source's real heart-losing error through the two-heart finish.

Does Level 109 have an opening cow?
No. The first decoded board is blank, including the teal singleton at r8c2.
What is the lower-row trap?
The source marks r7c5 red. The safe lower-left continuation is r6c3, followed by yellow r7c7.
What coordinate completes Level 109?
The final successful cow lands at green r5c9, after the brown r4c4 placement.