"He started feeling a little more lethargic and worse and he got a little bit of swelling around the wound and then now we just want to make sure we get him as much -- get him the IV, get him the antibiotics and make sure that he's back to 100 percent," Hinch said before Monday's game.
Hinch, who said he's unaware of what bit Rasmus, said the medicine has taken its toll, costing the outfielder a lot of sleep.
Hinch estimated Rasmus will be able to make the nine-game road trip that runs into the All-Star break, but said Rasmus won't start on Tuesday against the Royals, though that's as much a baseball decision as a medical decision.
Chandler Rome is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.