Regarding platelets, Dr. Bill and I disagree (as well as me & Dr. C).
I have not had a greyhound under 150,000 since my first two greys (when I felt I didn't know any better--did they have a TBD? probably ) I do chart my guy's blood work and if the platelets are falling, I feel there is a problem. With doxy treatment (even without a TBD panel), I've had many come up in platelets, the last being Huston who went from 104,000 to 179,000 after 8 weeks of doxy. Same with Toots, her platelets kept dropping and were down to 132,000 and after the imizol injection they jumped to 239,000.
If I remember right, the greyhound platelet issue was considered and the number lowered by A&M (Dr. Herron--a greyhound breeder) Since this is a tick state, I question the result and decision to lower the acceptable platelet count, especially since the 21 (I know, not a lot, but it's more than one ) greys I've had have not had platelets under 150,000 if treated with doxy.
I wish vets (more than just mine) would take greys with the lower platelet counts and put them on doxy and just see if they come up. It's a study I'd love to see happen.