Discounting Animals

Have any of y’all cracked the code on adopting out/discounting animals WITHOUT encouraging impulse buys. I usually don’t advertise adoptable animals until after talking up a customer about their husbandry and whatnot, then I’ll be like “oh by the way… I may or may not have a free animal for you…”. Current issue we’re having is no one even asks about the animals we have on the sales floor :( 75% of our animals have been in-store for over 3 months now, and about 25% for over 6 months. We even have a few that we’ve had for well over a year. I would like to try to push these animals into good homes but I don’t want anybody seeing a free animal as a fun spontaneous Tuesday activity