Shetland Ponies can have several disadvantages including susceptibility to serious metabolic health issues such as liver problems, hyperlipemia, and equine Cushing’s disease. They are prone to laminitis and metabolic syndrome due to their tendency to gain weight easily. Behaviourally, they can be cheeky and stubborn, requiring consistent training and social interaction to manage their mischievous nature. Additionally, they can damage lawns and plants, produce a substantial amount of manure, and are known escape artists and can be nippy, so secure fencing and careful handling are important.