Sounds like you're doing a great job so far! For our kitties, we give them atleast 48 hours with a covered kennel, a hide box and some pheromone spray (onto a towel or a stuffie) to decompress. If they're still nervous, we use positive reinforcement, giving them treats whenever we approach or enter the kennel to clean. I like to play some quiet instrumental music for them as well. I personally do clicker training with them using their favorite reinforcer (treats, pets, play, etc.). I highly recommend looking into Jackson Galaxy/Greater Good Charities Cat Pawsitive program!
For more general enrichment, our volunteers spend time with the shy ones just softly speaking to them and giving them reinforcers. If you're using wand toys, let them sniff it out first! The shy/fearful kitties may get spooked by the fast movements, so I usually start off slow. Lick mats, snuffle mats and puzzle toys are some of our favorites as well. The rubber and plastic ones are easy to clean and disinfect!
Hope this is helpful in any way!
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Brianna Mendonca
Cat Enrichment Coordinator
Hawaiian Humane Society
Honolulu HI
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