Final answer:
The vet can confirm the diagnosis of coccidiosis by examining the feces under a microscope, performing serological testing, and using concentration techniques.
Step-by-step explanation:
The vet is most likely to confirm the diagnosis of coccidiosis by:
- Examining the feces under a microscope over several days, ideally at least 7.
- Performing serological testing, including antigen testing, to detect the presence of parasites.
- Using concentration techniques and collecting specimens on multiple days, if necessary.