He had his bloodwork checked (bad then, much improved/normal now), a urinalysis, and as part of BDBH protocol, had his heartworm test (and tick - it's the SNAP 4) done again. BDBH tests when they come in and then again 6 months later because that's how heartworm works!
As you must have figured out, Harley is heartworm positive. Thankfully, he is eating well and doing much better than he was on Monday, but now he will need to be kept quieter and away from other dogs who may not be on prevention. We are working on a plan for Harley and will keep you posted!