i triend many trainers and you need to download outfit changer mod, it will have the same files as the lennys simple trainer so you need to replace to files, after youve downloaded it you can open the menu with F2 and go to ped outfit changer and then you can change the skins of the animals like playing with the ghost panther or something likr that
i liked the trainer everything is good about it and i really enjoyed playing red dead 2 with it but i think you should do the modles like the peds that you can choose outfits for animals like legendary animals and other skins it would be very nice if you would do it