The closest ER is about an hour to an hour and a half away unfortunately. I told my vet all the symptoms (vet tech actually) and she didn't seem overly concerned. She said it might be parasites. I'm just worried because since I last called them he's become more lethargic and downed more water.
Um, if it was parasites I doubt it would be a sudden change. From what you described it sounds like the puppy was acting healthy this morning and wehn you came home was acting like this.
I really really doubt parasites would cause such a quick change (parasites don't reproduce that quickly to go from having so few to so many!).
And if he is pretty lethargic, that's not that great of a sign (especially for a young puppy).
I'm really skeptical the vet tech took you seriously honestly (I work as a receptionist and while I'm not a Tech, I've been having to ask the vet similar questions on if something is serious or not. Lethargy is one of the first things he asks for to see how serious it is).
I mean I could be wrong but I honestly would err ont he side of caution in this case (particularly given what excuse the tech gave you. If it sounded something more plausable I'd say maybe they're right, but what she told you sounds completely off so I am not sure she really was taking you that seriously or she misunderstood you taht the dog was fine this morning. Or maybe I misunderstood you and this has been going on a while but I got the impression this was a pretty sudden change).