Complex sentence: However, the trend was short lived mostly due to city ordinances forbidding farm animals from being within the city limits and people discovering that even a 165 pound pig was a bit too much to handle in most housing situations.
Split into simpler sentences: However, the trend was short-lived mostly due to city ordinances forbidding raising farm animals within the city limits. Furthermore, many owners came to realize that even a 165 pound pig was difficult to handle in most housing situations.