From personal experience, if you have ticks that carry Lymes or some other nasty bug, there is a once a month pill that KILLS them dead shortly after they latch on. Credilo? My Brittany had a few nasty run-ins with Lymes $$$ and this is the better course. By the time you can see their rear quarters twisting to one side, weakness in the hind legs, and "rabbit hopping", the spirochette load is already substantial.
Oh, there is a vaccine for Lymes, there is a booster after about 3 wks...
Just hope the conditions are not right for Blastomycosis, nasty spore based infection that starts in the lungs... Blasto needs a certain level of moisture and temperature... Nasty. Rare, but nasty. My little girl had Lymes and Blasto, so along with the weakness in the hind legs, there are skin "cysts" start off hard, then the center softens and eventually opens...
That isn't the worst, left unchecked, Blasto can destroy internal organs and eyes... My guess is Lymes depresses the immune system enough for Blasto to start, I've seen the combo three, maybe four times... Doxy does not take care of Blasto...
Springers are energetic. You will have to get quite a bit of hunting in before the dog gets over the lack of bird work. Maybe not. My Brittany has taken a year to make significant progress...