Query Loop: Link to CPTs in other categories

Hello,

I created a CPT to show Details for a Pigeon in a special Color. About 30 Pigeons with there indidviduel colors are organized in 4 groups, each color is in one group, means category. The categories are “Einfarbig”, “Geherzt”, “Getigert” and “AOC”.

If I show one Pigeon in Detail, on my Page is a Section “Browse other Pigeon Colors in this group”. That works fine.

With an additional section I want to show 3 Images for the other categories. I don’t want to show the “current” category.

How to Query the Loop to list the 4 Categories with the additional Images (ACF, done)? To exclude the current category I hope will no problem for me.

Maybe helps:
https:/amsterdamer-kroepfer.de/development/farbenschlag/blaufahl-mit-binden/
Here you can see how it should be. But the Categories are added manually by me, not via Loop.

I’m sure GB 2.0 can do that. I only have to learn… Thx!