Annie Mears, 31 Mar 2025. Has anyone used PZP in donkeys? A local charity wants to look into its use for a very big population issue. Is there anyone I can contact to discuss it? Erik Verrynne, [31 Mar 2025 at 09:53:31]: Yes. It was developed for wild horses in the US by HSI (now Humane World) and is in use by American Wildhorse Conservation. You can contact them via their website in the US. Annie Mears, [31 Mar 2025 at 09:55:55]: Thanks Erik. I will have a look. Bart Gazendam, [31 Mar 2025 at 14:00:36]: Improvac might also be an option, it is used in horses 😊 Jacobus Roux, [31 Mar 2025 at 16:39:47]: Yes, I also use Improvac on horses and I know it has been used on elephants as well, so I am certain it will work on donkeys for chemical castration
