Last Friday, my 4 year old male boxer, Rocky, woke me up a few minutes before my alarm clock usually goes off. He sleeps in my room and it was about 5 a.m. when I woke up to find him suddenly run through my sliding door (it's got a tear in the middle so e sometimes walks through) into my broters and I heard him licking something. At first I just resorted to calling him back when I saw him standing by the main door that exits my brother's room and into the hallway and he wouldn't come. He was simply standing there, his head relatively level with his spine so I leaned over to see why he wouldn't come. After a few seconds he came in, but he lower his head and as soon as I realized he was about to vomit, I jumped out of bed and grabbed his collar before taking him downstairs to be let out into the backyard. As I finally got the door open, I felt him lowering and let go and looked back to see him collapse onto the floor. I tried to get him up but he wouldn't move. He was shaking slightly and his eyes seemed somewhat listless (can't quite explain), so I called my mom and she came to find us. So I explained what had happened upstairs and what happened when I tried to take him out and she brought up the idea that he might have eaten something bad. Since he had been licking something in my bro's room I checked their first to find he'd been licking up some vomit he'd probably just thrown up. I check my room, his bed, and his toys but saw nothing but a bit more vomit under my bed (likely from when I grabbed his collar earlier and he was vomiting). I went back downstairs to find my dad now in the kitchen with Rocky and my mom. Somehow they'd gotten him up, but he was still holding his head low and looked pretty miserable. Later, from what my mom told me when I called her before school started, he threw up a bit more within the two-hour time frame. He's been ok since, but I'm worried. My parents wont take him to the vet as often as they should and have yet to do so since the incident. Anyone know what could have caused the sudden illness?