Amanda Gommo, 51, was taking an afternoon nap with chihuahua Belle when the pooch became ill and had violent diarrhoea.
The mum-of-three was asleep with her mouth open, top and tailing with Belle, when the messy accident occurred, and some got in her mouth. She ran to the bathroom to be sick but later ended up in hospital with a gastrointestinal infection - passed on from the pooch.
Amanda, from Bristol, said: "I was having my afternoon nap with Belle, like I always do, when I suddenly felt something squirt in my mouth. I rushed to the bathroom and my son was in the shower, so before I washed it out I had time to take a quick snap."