The Port Lincoln RSPCA and Petstock's cat adoption partnership has resulted in 100 cats being adopted.
The program began in March last year before Elle Freeman and her family adopted Mickey recently, marking the 100th adoption.
Store manager Tammie Gudzenovs said adoption times varied but one cat was adopted 30 minutes after it arrived at Petstock.
Ms Gudzenovs said it gave exposure to the RSPCA's program as some people were not aware it had reopened at another site.
"It's a great point of contact, they often come back in for food and other supplies and we can ask how they are going," she said.
"Once they adopt the cat we can help them in the store sort out all the aftercare they need."
RSPCA centre manager Julia Churchett said similar programs were set up with shelters in Adelaide and this partnership was modelled on that.
"The exposure is definitely helpful, they might see the cat here (Petstock) and come down to the shelter and vice versa," she said.
"Thanks must go to Petstock, both the team locally and the head office for being so supportive and allowing us to work together."
She said even though the 100th cat had been adopted the program would continue indefinitely.