The Operative Removal of the Yolks from Newly-Hatched Chicks

Improvements in the Technique of Deutectomy of Newly Hatched Chicks, and the Effects of the Operation on Their Subsequent Development ,

“…The deutectomized chicks, however, never fully recovered from the early setback and consequently weighed less than controls at any age throughout the 8 week experimental period. Sloan (1936) found essentially the same trends as in the present study, although his deutectomized birds apparently gained less than controls for four or five weeks.…”

“…The down was removed from an area about J" in diameter, by trimming with scissors, and the area was sterilized by swabbing with 5 percent tincture of iodine. The site was thus anterior to and smaller than that chosen by Sloan (1936). Trimming the down was found to be more rapid and less disturbing to the chicks than was plucking it, as described by Sloan.…”

“…The incision length of |" recommended by Sloan was regarded as a maximum, if subsequent protrusion of the intestine were to be avoided. An incision not more than T V' long was suitable, which corresponded with the \" opening made by Menge et al (1951), and f" by Sloan (1936).…”

“…She operated on anaesthetized chicks. Sloan (1936) modified Parker's technique and adapted it for application to large numbers of chicks. He found that anaesthesia was unnecessary and even detrimental to the ease of the operation and survival of the chicks.…”

A Lymphoblastoma Occurring in Young Chicks Reared on a Diet Treated with Ferric Chloride to Destroy Vitamin E

“…The material forming the basis of the present report was obtained from the first group of 30 chicks and from a smaller group of 12 chicks which had been operated on for removal of the yolk sac at the time of hatching (Sloan, 1936). Observations were made daily on the physical condition of the chicks.…”