REVIEW 549 



REVIEW. 



1. Discuss the recent progress made in judging fowls for egg production on 



the basis of external characters. 



2. What is the relative importance of health and vigor? 



3. Describe the color of pigment changes in a bird's body due to laying. 



4. Which sections bleach first and what is the sequence of future bleaching? 



5. In what order does the yellow color reappear? 



6. What should be the condition of the abdomen in a heavy layer? 



7. How does the pelvic arch differ in a heavy and poor laying hen? 



8. What is meant by lateral or sternal processes? " 



9. What distinction in head points can be made relative to productive ability? 



10. Discuss the relation of time of moult to production. 



11. What are the two most important results to be accomplished by applying 



the selective principles to practice? 



12. What is the aim of a culling campaign and how should one be run? 



13. How many birds would you expect to cull from an average flock about 



the last of July? 



14. Describe the best and handiest method of culling a flock. 



15. Describe and give possible usage of a culling chart which enables the 



plotting of a curve to show the condition of a single bird. 



16. What, if any, are the possible errors in culling for egg production by external 



characters? 



17. How does the egg production of a hen compare with the length of her rest 



period? 



18. What is the possibility of hens culled early coming back into profitable 



laying again in a short time? 



19. What do you consider to be the advantage of culling as a part of the 



operations of a commercial poultry farm? 



References. Selection of Laying Hens, by Blakeslee, Harris, Warner and 

 Kirkpatrick, Connecticut Bulletin No. 92. How to Select Laying Hens, by 

 Kent, Cornell Extension Bulletin No. 21. The Histological Basis of Shank 

 Color in the Domestic Fowl, by Barrows, Maine Bulletin 232. A Study of 

 Egg Production in the Domestic Fowl, by Card, Connecticut Bulletin No. 

 91. . The Moulting of Fowls, by Rice, Nixon and Rogers, Cornell Bulletin 

 No. 258. Selection, The Basis of Improving the Poultry Flock, by Lewis, 

 New Jersey, Hints to Poultrymen, Vol. 5, No. 12. Eliminate the Slacker Hen, 

 by Aubry, New Jersey, Hints to Poultrymen, Vol. 6, No. 10. How to Tell 

 the Age of Hens, by Victor Fortier, Dominion of Canada Bulletin No. 16. 



