I am living in Belgium and have a couple of suggestions.
There is an online shop called
https://dierenwinkelshop.be/ , which has a showroom shop in Nevele, close to Ghent. It's not exactly in the south but still.
CHAINS
Maxi Zoo
https://www.maxizoo.be/nl/winkels
Tom & Co
https://stores.tomandco.com/nl
Zowizoo
https://www.zowizoo.be/
This one is closer to Antwerp which is north of Belgium, but still.
I find most online shops better in quality and range, but you might enjoy just a lookaround or make a few lucky finds.
