I Have a Cat [Cats]

I saw my cat pawing at the screen door, so I figured she wanted to go outside. She's an indoor cat, so she rarely gets to go outside. I grabbed a dog leash (since she doesn't have her own leash), and hooked it onto her flea collar. Her canine housemates were outside, but they were in the far end of the yard, so I thought they wouldn't bother my cat. Unfortunately, they appeared right away. My cat started hissing, so I brought her back inside. The dogs tried to follow, and my cat clawed at the glass sliding door. I carried her upstairs behind the baby gate, but the dogs followed me and tried go upstairs, so I pushed them out. My cat them threw up. I think it was from the anxiety of the event.