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Horse
Cow
Sheep and Goat
Pig
Dog
Cat
Di 1
0–1 wk
Before birth
3–4 wk
4–5 wk
2–3 wk
Di 2
4–6 wk
1–2 wk
2–3 mo
Di 3
6–9 mo
I 1
2½ yr
2 yr
1–1½ yr
12–15 mo
4 mo
4–7 mo
I 2
3½ yr
1½–2 yr
16–20 mo
4½ mo
I 3
4½ yr
2–2½ yrb
8–10 mo
5 mo
Dc
Does not erupt
0–2 wk
C
4–5 yr
3½–4 yr
2½–4 yrc
6–10 mo
5–6 mo
Dp 2
0–3 wk
0–4 wk
5–6 wk (upper only)
Dp 3
1½ mo
5–6 wk
Dp 4
1–5 wk
P 1
5–6 mo (wolf tooth)
—
4–5 mo
P 2
2–2½ yr
4–7 mo (upper only)
P 3
3 yr
P 4
4 yr
2½–3 yr
M 1
9–12 mo
3–6 mod
4–6 mo
M 2
8–12 mo
M 3
18–20 mo
6–7 mo
a Average data, subject to considerable variation
b 2 yr in goats
c 2½–3 yr in goats
d 3–4 mo in sheep