Becoming overheated can precipitate severe breathing difficulties and even death. (wagbrag.com)
In some cats, further signs may develop that are strongly suggestive of asthma — in these cats there is a very sudden onset of severe breathing difficulty and wheezing, with cats often having great difficulty in catching their breath. (icatcare.org)
According to the RSPCA, extreme features like short, flat faces can lead to severe breathing difficulties, heatstroke and fainting among dogs. (huffingtonpost.co.uk)