My Cochin Bantam ate a couple of slugs about a month ago and has been gaping, stretching her neck and making choking sounds for the past couple of weeks-she is eating fine, her comb looks good, no runny nose or eyes and she isn't acting like she has a cold or is ill. A local woman who has raised chickens for years told me to get Ivermectin and treat the chicken. She told me to get the pour-over, but it's way too expensive for just 1 chicken. How much of the paste should I give my Cochin? A pea-sized portion? She weighs about 2 lbs. I think.