What are some common causes of a dog flop and how can it be prevented?

A common cause of a dog flop is overexertion or exhaustion from physical activity. This can be prevented by ensuring your dog gets regular exercise but not pushing them too hard. Another cause can be heat exhaustion, so it's important to keep your dog cool and hydrated, especially in hot weather. Additionally, certain health conditions or injuries can also lead to a dog flop, so regular vet check-ups and proper care can help prevent this.