Is there an opening X on Level 158?

No settled X is visible in the first prepared frame; the seeded cow is at r8c8 and the X field begins as the solve starts.

What is the first new Level 158 placement?

Place the orange singleton cow at r3c2 after keeping seeded r8c8.

The seventh new cow goes at r4c5 in the light-blue territory, producing the Unbelievable state with all three hearts.

Zoodoku level guide

expert 8 colors

Zoodoku Level 158 is a seeded 8x8 cow board; keep r8c8, then follow r3c2, r1c1, r5c3, r7c4, r6c7, r2c6, and r4c5.

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Keep the seeded cow at r8c8 in the teal territory.
Place the first new cow at r3c2 in the orange singleton.
Place the second new cow at r1c1 in the green territory.
Place the third new cow at r5c3 in the mauve territory.
Place the fourth new cow at r7c4 in the pink territory.
Place the fifth new cow at r6c7 in the yellow territory.
Place the sixth new cow at r2c6 in the purple territory.
Finish with the seventh new cow at r4c5 in the light-blue territory, then confirm Unbelievable.

Colors in this level:

Green, Light-blue, Purple, Orange, Mauve, Yellow, Pink, Teal

Keep seeded r8c8, then take orange r3c2, green r1c1, and mauve r5c3 before the center sequence.
Close with yellow r6c7, purple r2c6, and light-blue r4c5 in that exact order.

Board notes 5 details

Layout: The 8x8 opening has green at the upper-left, light-blue across the upper center, purple on the right, an orange singleton at r3c2, mauve through the lower-left, pink across the bottom center, yellow through the center-right, and the seeded teal cell at r8c8.
Goal: Keep the seeded cow at r8c8 and place the new cows in verified source order r3c2, r1c1, r5c3, r7c4, r6c7, r2c6, and r4c5.
Opening: The first prepared frame contains the seeded r8c8 cow but no settled opening X; propagation begins after the first source placements.
Danger Zone: Use light-blue r4c5 rather than adjacent yellow r4c6, and purple r2c6 rather than r2c5; the source shows no red error.
Mechanics: This is a seeded eight-cow 8x8 board with a blank opening, an orange singleton, and a late purple/light-blue center close; the final source frame shows Unbelievable with all three hearts.

Is there an opening X on Level 158?
No settled X is visible in the first prepared frame; the seeded cow is at r8c8 and the X field begins as the solve starts.
What is the first new Level 158 placement?
Place the orange singleton cow at r3c2 after keeping seeded r8c8.
What is the final Level 158 placement and result?
The seventh new cow goes at r4c5 in the light-blue territory, producing the Unbelievable state with all three hearts.