My healthy 80lb, 7 yr old black lab, Nemo had a great time up at a lakehouse in Vermont over Labor Day weekend. The last few days however, he has been very lethargic, refusing to physically get up in the morning, or after resting for longer periods,, even when food is involved. Definitely NOT usual Nemo behavior. Went to the vet today and preliminary blood tests scored a high positive for Anaplasmosis, a tick-borne virus. Got Doxcicylin for him, which he is supposed to take twice a day for a while. Anybody have any experience with Anaplamosis? How long does it persist, and were there any side effects?

Thanks in advance.