Forced selling was unavoidable in unregulated markets. The most classic example was the world's IT hubs. In order to gain short-term profits, they were willing to lie, sell fake goods, pass off second-grade products as first-grade ones, and use forced selling. They had a plethora of methods to scam their consumers out of their hard-earned money. With the rise of e-commerce, IT hubs had, of course, become weaker. But even then, there were some individuals who rushed to IT hubs due to their lack of knowledge and ended up falling victim to their vicious ways.
The pet market was quite similar to the early phases of the computer parts and DIY market, but it was worse. The same despicable methods existed in order for people to scam money out of consumers. But with the flexibility and unpredictability of the pricing of animals, there was no way for them to reason their way out of it, and they only had their own bad judgment to blame.