My 5-6 month old cockatiel vomited i need help immediately as he had what looks like saliva but feels like slime on him he also shakes his head and sent what looked like and felt like clear mucus and got his feathers caked together how do i clean that and I think he might have vomited from nausea as I was spinning with him he is also very less in weight pls help and I cannot take him to a vet so what do