Megan went into apparently what the vet called cardiovascular shock this evening when Di had her at the dog park.
This is a c/p from Di in an AIM.

she fell over at the dog park.. like.. she was chasing some dogs and all of a sudden someone noticed she was lying down and wasnt moving so i ran over and her legs were stiff.. i got soo scared.. it almost looked like she had died.. :'(:'(:'(:'(:'( but then her legs started twitching kinda and she was making little growly noises but she wouldnt get up or move.. so i picked her up and carried her to the car and one of my dog park friends drove while the other helped me with miko..
the vet said she'd be okay.. but i left her there overnight for observation..
but in the car on the way to the hospital she seemed to get better... she started panting.. altho sometimes her tongue would flip up like a pug's tongue does when panting which was VERY unusual for her..
the vet said it probably wasnt a seizure that she had but he thinks she went into some kind of shock.. like, he thought cardiovascular shock... and he said another thing that concerns him is that he did hear a SLIGHT heart murmur
so right now she's at the vets for observation.. and i can decide later on if i wanna run more tests to figure out if anything is wrong or anything... but then it would get really expensive.. for the radiographs and chest x-rays.. the total he gave me if i got all the tests done was a bit over 1,000 :-\.. the overnight stay was only $395 or so.. i paid a 200 deposit and i pay the rest in the morning.. i just hope she'll be okay.. he said they've got her stabilized and she seemed to be doing better