beaglemom,
Necks are very high in bone content and they are probably not use to digesting that much or even digesting real raw bones to begin with. The meat from the necks probably digested well and quickly as compared to kibble that can take up to 12 hours or more. I’d wait a couple days to give them another one and even introduce something with more meat like a whole leg (skinless to begin with) or give them half a neck with some additional meat/organs. You can also introduce more bone (and raw in general) into their diet to get them used to it with commercial products. I fed mine commercial patties for several months before doing RMB and started mine with chicken wings and then drumsticks. My recipe book calls for x amount of necks with x amount of meat so just a neck by itself if just too much bone. BUT given just a few times a week should be ok once they work their way up to it.
