Hostname: page-component-7479d7b7d-fwgfc Total loading time: 0 Render date: 2024-07-12T16:28:36.249Z Has data issue: false hasContentIssue false
  • English
  • Français

Levels of first winter feeding in relation to performance of Cheviot hill ewes V. Dental development and persistence

Published online by Cambridge University Press:  27 March 2009

R. G. Gunn
R. G. Gunn
Affiliation:
Hill Farming Research Organization, 29 Louder Road, Edinburgh 9
Get access Rights & Permissions [Opens in a new window]

Extract

1. The effects of different levels of first-winter nutrition over 3 years were studied on the subsequent dental development of groups of North and South Country Cheviot ewe hoggs (sheep between months and 1½ years) by recording the time eruption of each of the four pairs of permanent incisors. High-plane first-winter feeding resulted earlier eruption of the first pair of permanent incisors. Later pairs were affected to a lesser extent, with low-plane/hill-wintered groups consistently the latest to erupt. Breed and year deviations from the general pattern were small and were largely due variations in growth rate both prior to and during treatment.

2. The effects of first-winter treatment were also studied on the heavy and light hoggs (i.e. those above and below average weight) prior to treatment. Although there was only a very limited difference the time of eruption of the heavy and light within each treatment group, the effects of treatment were greater in the heavy-weight class than they were the light.

3. The effects of first-winter treatment on dental efficiency and long-term persistence were also studied. There was little difference amongst treatments at 5½ years of age in the bite position, or looseness, wear, or condition of the teeth. Brokenmouth, i.e. the loss of one or more permanent incisors, did not appear in significant proportions until 7½ years of age, when considerable treatment, breed, and year differences were present. The incidence of broken-mouth was lowest in the high-plane and hill-wintered groups and highest in the lowplane and mid-plane/away-wintered.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 69 , Issue 3 , December 1967 , pp. 345 - 348
Copyright
Copyright © Cambridge University Press 1967

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Brown, G. T. (1949). Dentition as Indicative of the Age of the Animals of the Farm, 9th ed.London: Murray.Google Scholar
Coop, I. E. & Clark, V. R. (1955). The influence of method of rearing as hoggets on the lifetime productivity of sheep. N.Z. Jl Sci. Technol. A 37, 214–28.Google Scholar
Duckworth, J., Hill, R., Benzie, D., Dalgaeno, A. C. & Robinson, J. F. (1962). Studies of the dentition of sheep. I. Clinical observations from investigations into the shedding of permanent incisor teeth by hill sheep. Res. vet. Sci. 3, 1–17.CrossRefGoogle Scholar
Franklin, M. C. (1950). The influence of diet on dental development in the sheep. Bull. Aust. Coun. sci. ind. Res. no. 252.Google Scholar
Gunn, R. G. (1964 a). Levels of first winter feeding in relation to performance of Cheviot hill ewes. I. Body growth and development during treatment period. J. agric. Sci., Camb. 62, 99–122.Google Scholar
Gunn, R. G. (1964 b). Levels of first winter feeding in relation to performance of Cheviot hill ewes. II. Body growth and development during the summer after treatment, 12–18 months. J. agric. Sci., Camb. 62, 123–49.CrossRefGoogle Scholar
Gunn, R. G. (1967). Levels of first winter feeding in relation to performance of Cheviot hill ewes. IV. Body growth and development from 18 months to maturity. J. agric. Sci., Camb. 69, 341–344.CrossRefGoogle Scholar
Wiener, G. & Purser, A. F. (1957). The influence of four levels of feeding on the position and eruption of incisor teeth in sheep. J. agric. Sci., Camb. 49, 51–5.CrossRefGoogle Scholar