I bought some Bantams from TSC last night. Right when I got home I noticed one of my silkie-looking Chicks was lethargic and would not drink or eat. I gave her sugar water and she drank a bit. But then she started to puke up this clear thick stuff and died. So I woke up this morning to find another one of my chicks this way and she’s progressively getting worse. She has a very hard crop, I soaked her bum but it didn’t look swollen or impacted once I did clear poop away. I have her some olive oil and some water with probiotic in it but she didn’t want to take either. Is there anything else I can do? And at what temp should I keep her at?