[frontierrots]

Yes those symptoms are consistent with Giardia or coccidia or even parasites as well as other non parasitic conditions

In order to be sure he does not have hook or whip worms 3 fecal tests 10-14 days apart need to be done (the South is a hotbed for these) and they need to be asked if they can specifically check for coccidia at those tests as well, plus a single snap test for Giardia should be done

This would be my baseline for tests before moving on to more complex or costly ones