Mr Huggins says he believes the cost of living crisis is pushing people to abandon the animals.
But he says it is impossible to point to one single reason behind the issue as each goat's story is different.
Some dropped off at Buttercups were taken on as pets but the owners found them too difficult to look after, or they lost interest, he said.
Others, meanwhile, were recovered by the police dumped on the side of the road or "thrown over" the site's gate, Mr Huggins said.