Biscuit
My 9 month old, vasectomised male ferret has been vomiting a few times this week and has put on maybe 1 or 2 lb's over the past 2 weeks (which is more than what people suggest as winter fat - they are kept outside during the day, but inside after 1900). Ive tried giving him plenty of water, food and hariball paste, but hes not getting any better. He is also quite lethergic and does not seem to want to play as much. He tends to sleep or watch the other 2 play around.