In making the mating, size is important and breeders should be selected which are up to standard weights if possible. While this breed is not kept very widely at the present time, nevertheless it is an excellent market duck, dressing out into a very plump yellow carcass in spite of its black plumage which is a disadvantage in dressing. The color should be a lustrous greenish black throughout, being somewhat brighter in the drake than in the duck. The duck is more likely to show a brownish cast of plumage, particularly as she grows older. It is hard to hold good black color with age. Moreover, white or gray is apt to occur in the breast of females. With age also a little white sometimes develops on the back of the neck, around the eyes and underneath the neck at the base of the bill. The white which occurs in breast is more likely to come in ducks and is not commonly found in the drakes. In the drakes on the other hand, there is a tendency for the white to come on the throat under the bill. Drakes as a rule run truer in color and hold their color better than do the ducks. Where the white mottling occurs in plumage with age one need not hesitate to breed from these birds if they were of good black color as young birds. The drakes of the best color do not as a rule fade or become mottled to any great extent with age. It is necessary to guard against birds as breeders which have a rusty brown lacing on the breast and under the wings, also those which have a wing-bow laced with brown. There is a tendency for the bill of drakes, which should be black, to be too light or olive in color and this tendency increases with age. Drakes with bills of this color should be avoided as breeders. When Cayugas are first hatched the baby ducks all show a white breast. [Illustration: FIG. 7. Upper--Cayuga Duck. Lower--Cayuga Drake. (_Photographs from the Bureau of Animal Industry, U. S. Department of Agriculture._)] _The Call._ The Call ducks are the bantams of the duck race. There is always a tendency for them to grow too large and this is especially true when they have an opportunity to eat all they want as for example when they are fed with the larger ducks. They should not be fed too liberally and should be given wheat or some other solid grain rather than any mash. If there is a good pond of water to which the Call ducks can have access they do not need to be fed much of anything.