Hi i'm new to this forum and I need some help with my cat.He's 4yrs old and up until today he's been fine.Today he started vomit clear liquid and he's also constipated.We feed him meow mix for indoor cats but about 6days ago my wife picked up some purina deli cat.All he does is lay around and sleep he'll walk for alittle while then go back to sleep.I'm taking him to the vet in the morning but I wanted to know if there is something i can do for him tonight to make him feel better?And also is there anyone that has had a similar problem with there cat?