Merck Manual

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Eruption of the Teeth a

Eruption of the Teeth a

Horse

Cow

Sheep and Goat

Pig

Dog

Cat

Di 1

0–1 wk

Before birth

0–1 wk

3–4 wk

4–5 wk

2–3 wk

Di 2

4–6 wk

Before birth

1–2 wk

2–3 mo

4–5 wk

3–4 wk

Di 3

6–9 mo

0–1 wk

2–3 wk

Before birth

3–4 wk

3–4 wk

I 1

2½ yr

2 yr

1–1½ yr

12–15 mo

4 mo

4–7 mo

I 2

3½ yr

2½ yr

1½–2 yr

16–20 mo

4½ mo

4–7 mo

I 3

4½ yr

3½ yr

2–2½ yrb

8–10 mo

5 mo

4–7 mo

Dc

Does not erupt

0–2 wk

3–4 wk

Before birth

3–4 wk

3–4 wk

C

4–5 yr

3½–4 yr

2½–4 yrc

6–10 mo

5–6 mo

4–7 mo

Dp 2

0–2 wk

0–3 wk

0–4 wk

4–6 wk

4–6 wk

5–6 wk (upper only)

Dp 3

0–2 wk

0–3 wk

0–4 wk

1½ mo

4–6 wk

5–6 wk

Dp 4

0–2 wk

0–3 wk

0–4 wk

1–5 wk

4–6 wk

5–6 wk

P 1

5–6 mo (wolf tooth)

5 mo

4–5 mo

P 2

2½ yr

2–2½ yr

1½–2 yr

12–15 mo

5–6 mo

4–7 mo (upper only)

P 3

3 yr

2–2½ yr

1½–2 yr

12–15 mo

5–6 mo

4–7 mo

P 4

4 yr

2½–3 yr

1½–2 yr

12–15 mo

5–6 mo

4–7 mo

M 1

9–12 mo

5–6 mo

3–6 mod

4–6 mo

4–5 mo

4–7 mo

M 2

2 yr

1–1½ yr

9–12 mo

8–12 mo

5–6 mo

M 3

4 yr

2–2½ yr

1½–2 yr

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