We took our chicken into the vet today to have her beak trimmed (she has a crossed beak). They were holding her and getting ready to trim it when she started to struggle against them and was getting freaked out. She closed her eyes, started tipping her head down and her comb turned a dark purple. The vet said she was holding her breath. It was scary to watch and luckily she eventually perked back up. Is it possible for a chicken to faint during a stressful situation?