Contagious diarrhea?

please bare with me as this is gonna be kind of long...

about 2 weeks ago i had found a 3-4 month old 25 lb german shepherd mix pup i named Rayne who got suddenly ill and had bouts of vomiting up her food and then vomiting saliva and lethargy over a course of 2 days, no bowel movements, wasn't eating but was drinking water. on the third day of it i took her to the vet, got a neg parvo test, pos hookworm test so the vet prescribed metronidazole and sufalcrate as well as a dose of dewormer. tests and meds costed close to $400... well i guess her body was just too weak and she passed away that very night.

anyway NOW a week later i have a full blooded german shepherd pup named Bella, 14 weeks old and 25 lbs. took her to the vet on feb 7, 2013 for her shots, did a fecal came back neg for worms. well on saturday night (feb 9, 2013) she vomited up her food but instantly tried to eat it back up. I gave her some water and let it be for the night. sunday morning i made some rice and chicken and she scarfed it down. about 10am she started having soft gooey yellow stool and by noon she was having liquid yellow stools. she vomited liquid yellow once but other than that just the diarrhea. at around 8:30pm i gave her more rice/chicken/green beans about 2 tsp scoops full and mixed with some warm water and she ate it. i also gave her rayne's meds (which you're probably gonna yell at me for yes i know i shouldn't be self medicating her i'm just freakin out cause i just had a pup die on me right after taking her to the vet). she hasn't pooped yet but is a little lethargic and just icky feeling. it's now monday.. fed her the rice mix again this morning and she ate it, gave her the meds again... still hasn't pooped but did throw up some at around 11:45am.. she is drinking water throughout but her symptoms are a little similar to rayne's so could is be environmental? we have been having a lot of rain lately so maybe sometyhing in the ground? or just coincidental? i just forked up $400 at the vet and kinda don't wanna be going totally broke but i will end up taking bella back to the vet if she gets worse...

i guess my question is do you think the illnesses are linked though they didn't come from the same place? i also have a 1.5 year old doberman/husky who's perfectly healthy.

hey dr. marie thanks for your quick response... i'm thinking they gave rayne the metronidazole cause she had a fever when i took her in so maybe she had some internal infection? they gave her a dose of pyrental paomate paste (not sure if that's spelt correctly)for the hookworms. The 2 pups are not from the same breeder ... i found rayne ont he side of the road and I got bella from a woman who owns her parents. Also, i forgot to mention that bella DID eat a handful of dry cat food as well as some kitty poop the day she first threw up which i what i intially thought brought on the diarrhea and vomiting... but would it really last this long? Rayne was pretty much gagging a vomiting throughout the whole 2 days but bella has vomited once each day... she's having some funky stomach gurgling now but still no diarrhea after her vomit spell at 11:45

Thank you Dr. Marie. I ended up taking bella to my regular vet (the vet i had taken rayne to was a different vet cause it was on a weekend after my reg vet was closed) Well good news is he couldn't find anything that was an iminent danger to her. no blood in her stool, no parasites, no fever. He said she could possibly be feeling icky due to all the stress of being in a new family as well as when he gave her the vaccines a few days ago. so for now we're just monitoring and i'm to call him if she gets any worse

Funny little tidbit... I got my dobie/husky when he was 5 weeks old which was "too young" to leave his parents yet I've never had nearly as much complications with him as I had with Rayne and now Bella... lol

Well things are def getting a little worse... It's now midnight and she's vomited about 3 times since I took her to the vet at 4pm and she also had the first bowel movement of the day 10pm and was just laying in it so my husband bathed her... I'm trying desperately not to freak out but failing quite often. I've given her some gatorade and water through a syringe cause now she is more listless and doesn't want to drink but she ended up vomiting that as well. I will call the vet when they open if I don't have a stroke before then :-/

Hey Dr. Marie
Update... I'm highly suspecting parvo now as Bella finally had a bowel movement at 10:45 this morning and it was disssgusting.... Not yellow anymore, Brown and blood streaked really thick mucus and smelled like rot... I already called the vet and am taking her back at 3pm... Is there anything I can do for her in the mean time?

Update: It's NOT parvo (thank God) ... He believes she has gastroenteritis due to stress and some kind of bacteria.. did a cvc blood test and everything was normal except she's just a tiny bit anemic but he's not worried about it... Did another fecal on the poop I brought in and it didn't show any parasites ... He gave her a shot of cerenia and then prescribed... Metronodazole lol same dosage I've been giving her yay. He also gave me a 60ml syringe to give her fluids (Gatorade and water) he wants me to give her 5 of those every 3 or 4 hours though I've been giving her about 2 for now... She does drink regular water on her own... She's up a little more often now so I give her about 15-25 ml of pureed rice/chicken/water every so many hours... Hopefully she can process it well :)