So microchipping at a large cost to breeders is working well then?
The animals, all female cockapoos, were found tied to a gate in the middle of a quarry off Barley Green Lane in Alrewas by a cyclist last week.
The animal charity has launched an appeal for information.
RSPCA inspector Graeme Brookes said seeing them in such a condition was heartbreaking.
"They were cold, wet, shivering and very scared and had probably been left there in the early hours," he said.
"One of them was so terrified that she couldn't walk on a lead.
"I had to carry her to my van, and while she was in my arms, she locked eyes with me and wouldn't look away. When we arrived at the vet, she wouldn't leave me."
The dogs are now being cared for at an emergency boarding facility. All are microchipped but details are out of date"