If the defect is too large to be corrected by glue alone, tissue paper may be used to cover the defect, using several coats. Repaired eggs should be hand-turned, and weighed frequently. Recognizing DIS embryos by candling is an important skill. Early embryo death is easy to diagnose by the presence of a blood ring. Older embryos that die turn very dark as the blood supply recedes.
Blood vessels indicate a viable embryo.
F. The higher the temperature, the faster the chick will develop, up to a certain point. Chicks incubated at the incorrect temperature will be weak hatch chicks, if they survive at all. Lower temperatures will cause the embryo to develop too slowly. For most psittacine eggs, the incubator temperature should be between 98.5 and 99.7 degrees F. Incubators may have several different temperature areas within the same compartment. Incubators with a glass window may have a temperature reading of several tenths of a degree lower near the glass.