I rescued an African? goose last weekend from a not great situation. She was the only goose in a 20x10 indoor room with concrete floors and cinder block walls and about 100 other chickens and meat birds. She is very emaciated, keel visible, breathing heavy, and was pretty lethargic. Since last week, she has been out in my yard grazing for @8 hrs per day with access to a kiddie pool, and eats @2 cups of waterfowl pellets and scratch overnight in her pen. Her mood had improved 1000%. I drench wormed with ivermectin mid week. She still breathes heavy at times, but seems to be greatly improved overall. Winter is coming. What is the best and safest way to pack some weight back on her?