UNIVERSITY OF CALIFORNIA • COLLEGE OF AGRICULTURE AGRICULTURAL EXPERIMENT STATION BERKELEY 4, CALIFORNIA DEBEAKING POULTRY W. E. NEWLON' and J. R. TAVERNETTF Cannibalism and feather picking among chick- ens, turkeys, and pheasants cause considerable losses to flock owners. These vices increase bird mortality and reduce the market value of chickens because of bare or pin backs and of turkeys because of blue backs. A number of me- chanical devices, antipick salves, and diet changes have been used to prevent the vices; but none of these methods have been universally suc- cessful. Several years ago a poultryman in San Diego County, California, tried debeaking his birds (removing part of the upper beak) to stop cannibalism and feather picking. Since the re- sults were satisfactory, other poultrymen in that area adopted the method; and it has now be- come a common practice with many flock owners throughout the state. Wherever used it has dis- placed all former methods. The procedure in debeaking is to remove a portion of the upper beak (fig. l) by means of a heated knife, which cauterizes the tissue and prevents bleeding. drink within a few minutes after being debeaked. Mash should be fed immediately to discourage picking at other things that may injure the beak. Grain or other coarse materials should not be fed for about 24 hours, since these may cause bleeding. All feed should be placed in hoppers, because debeaked birds cannot take it off the ground or floor so easily. The birds have less tendency to pick over the feed and bill it out of the hoppers: being unable to pick up choice particles, they are forced to eat exactly what is mixed for them. They have difficulty in eat- ing green feed unless it is chopped and fed in hoppers rather than in large pieces on the ground. They cannot easily obtain sufficient shell and limestone or granite grit even from hoppers, be- cause they hesitate to force the lower beak into these heavy materials. This difficulty is over- come, however, if the shell and grit are fre- quently scattered over the grain or mash. Flocks of debeaked growing birds have made greater average weight gains than flocks of non- Fig. 1. — Debeaked chickens: on A and B about one half of the upper beak has been removed; on C and D enough was removed several months ago so that the beak healed over but did not grow back. Effect on Birds Observations made on many flocks throughout the state show that debeaking is a positive con- trol for all forms of cannibalism and feather pulling. Growing birds tend to be more uniform in size and in feather condition, and all birds are less nervous and more quiet . There are no harmful effects; hungry birds start to eat and Poultry Specialist in Agricultural Extension. Associate Agricultural Engineer in the Ex- periment Station. UNIVERSITY OF CALIFORNIA LIBRARY COLLEGE OF AGRICULTURE DAVIS debeaked birds. Two reasons are given: First, the birds must eat the feed as it is mixed, thus obtaining a more balanced diet. Second, the ag- gressive birds are unable to drive the timid ones away from the feed; the latter obtain their share; and so the flock is more uniform in size and has a higher average weight. Debeaking Devices The first device used for debeaking was a soldering iron with a chisel point that required two persons for the operation. While one person CI] held the bird's upper beak over a lath or some similar object, another handled the soldering iron. Since then, however, devices both home- made and commercial have been developed with which one person can do the job. Figures 2 to 4 show a satisfactory homemade device developed at the University of California. It consists of a 350-watt soldering iron with a removable tip replaced by a specially constructed Fig. 2.--A homemade debeaker us- ing an electric soldering iron fitted with a special tip. Fig. 3 ---The soldering iron and the special tip. The tip on the iron is turned 90 from its normal position. one. This tip was made by welding a piece of l/8-inch flat, hard, alloy steel over the end of a sleeve that had been threaded to screw onto the heating element. This piece of steel extends down about 1/2 inch below the sleeve and is bev- eled on the back side to make a cutting blade about 1 inch wide. Any heavy-duty (250- to 500-watt) soldering iron, with or without a removable tip, may be prepared for this purpose by merely cutting off the copper tip 1/4 inch in front of the heating element and brazing the cauterizing blade onto the stump. This procedure eliminates the sleeve mentioned above. The soldering iron is clamped on a small board hinged to the main base. The tip of the iron is held about 3 or 4 inches above the beak rest by a spring and is pulled down by a foot lever attached to the tip by means of a chain and rod. The beak rest consists of a piece of standard l/8-inch iron pipe flattened to a l/4-inch thickness where the beak is placed. One end of the pipe is connected to a pail of water by a rubber tube (fig. 4). When the de- vice is being used, water is allowed to trickle through the pipe to keep it cool and to prevent burning of the bird's mouth. A flow of a drop of water every 2 or' 3 seconds is sufficient for the cooling. A shield made of l/4-inch asbestos Fig. 4. --Another view of the homemade debeaker, showing the various parts. The asbestos shield has been removed from its supports and placed in a horizontal position. board is placed across the front of the device (see fig. 2) to protect the bird's comb and the operator's hand from the heat of the iron. A hole about 3/4 inch square is cut in the shield at the beak rest for inserting the beak. The entire unit is mounted on a main base that can be fastened on a table or special stand. A piece of asbestos is wrapped around a portion of the heated tip to assist in maintaining the heat. Figure 5 shows the only commercial unit now being manufactured. The removable cutting blade is on the end of a copper rod attached to a hand lever. A portion of the rod recedes into a hollow heating element , and the heat is conducted down the rod to the blade. The lever is attached to a spring that normally holds the blade up. It can be operated by hand or can have a foot pedal attached to it. The beak rest is made of a piece of partially flattened copper tubing and is cooled by siphoning from a pail of water. The unit is also equipped with an adjustable beak [2] stop for gauging the amount of beak to be cut off. The heating element has a connected load of 250 watts. In figure 6 is sketched a new model of commercial debeaker to be manufactured by the same company as the model in figure 5. Fig. 5.--A commercial debeaker. Fig. 6. — A sketch of a proposed model of commercial debeaker to be manufactured by the same company as the model shown in figure 5- Debeaking Practices Both turkeys and chickens from hatching to maturity have been successfully treated. Age does not seem to be important except that newly hatched birds should learn to eat before being de beaked. They should therefore be 3 days old or more. The most common practice is to debeak when the birds are removed from the brooders. Birds that depend on the range for a portion of their feed, however, should not be treated. De- beaking of breeding roosters has not been suf- ficiently investigated and is not recommended. It has, however, been successfully done on breed- ing toms. The time required for the beaks to grow back to normal varies according to the amount removed. Sufficient experimental work has not been done to make exact determinations on the rate of re- growth. According to general observations, how- ever, regrowth takes 3 to 6 months when one third to one half of the beak is removed, and can be stopped entirely by removing three quarters or slightly more (fig. 1, C and D) . Cauterizing the beak to prevent bleeding is very important and should be done carefully. For proper cauterizing, the blade should be hot enough to have a dark-red color (about 1,000°F) or be slightly hotter. Some operators prefer to use a sharp blade that cuts quickly and then to cauterize by holding the beak against the blade for a second or so. They claim that crushing of the beak is lessened by this method. Other op- erators prefer to use a relatively dull blade that cuts more slowly and has time to cauterize while cutting. Either method is satisfactory provided the heat is applied long enough to stop the bleeding but not so long as to injure the bird. Young birds can be cauterized more quick- ly than older ones. When a foot-operated unit is used, the bird may be held by the legs with one hand and by the head and neck with the other. The beak is held open by pressing on the angle of jaws with the thumb and forefinger or by placing the fore- finger in the mouth. When a hand-operated de- vice is used, the bird's legs may be held well up into the operator's right or left armpit while the head and beak are held in position with the same hand. In this way the other hand is left free to work the lever. Care should be taken to have the bird's tongue below the beak rest. The rate at which debeaking can be done de- pends on the age of the birds, the experience of the operator, and the amount of assistance avail- able. When the birds are given to an experienced operator as fast as he can handle them, 200 to 300 adult and 300 to 400 young birds can be de- beaked per hour. One operator with three assist- ants was able to debeak 300 6-week-old birds in a half hour. 5m- Aug. ,'44(1216) [3] Digitized by the Internet Archive in 2012 with funding from University of California, Davis Libraries http://archive.org/details/debeakingpoultry49newl