Final answer:
The three differentials for scanty "blackberry" jam feces in cattle are Salmonellosis, Coccidiosis, and Clostridial enteritis, which are conditions caused by different pathogens but may present with similar gastrointestinal signs in affected animals.
Step-by-step explanation:
The question concerns the differential diagnosis of cattle presenting with scanty "blackberry" jam feces, which is a clinical sign often indicative of certain gastrointestinal conditions. Among the options provided, the most likely differentials for this clinical presentation in cattle are Salmonellosis, Coccidiosis, and Clostridial enteritis. These conditions are caused by different microorganisms and can result in similar gastrointestinal symptoms, including diarrhea, which may contain blood and/or mucus, looking like "blackberry" jam.
Salmonellosis is caused by Salmonella enterica and can lead to enteritis and septicemia. Coccidiosis is an infection with protozoan parasites of the genus Eimeria that affects the intestinal tract, while Clostridial enteritis, particularly caused by Clostridium perfringens, is a bacterial infection that can result in severe necrotizing enteritis and diarrhea in cattle.