Many residents of southern and central Florida do not realize they may have an invasive species right in their own backyard. The cane toad is a native of Central and South America and was introduced to Florida as a means to control white grubs in cane fields.
1 Breathing difficulties: Shortness of breath, wheezing or noisy breathing (called stridor) may all be signs of lung cancer.  Loss of appetite: Many cancers cause changes in appetite, which may lead to unintended weight loss.
Less commonly, wheezing may also be caused by these health problems: 1  Cystic fibrosis. 2  Obstruction from a foreign body which has been inhaled (such as a coin) 3  A tumor in the lungs.  Congestive heart failure (usually in older adults)