I have multiple mods in my mod folder, all for 1.12.2. All of them work properly and show up when I actually start the game. When I add Copious Dogs into the mod folder, it doesn't even show up in game. It's a .jar file, and the game opens up just fine, all the mods are there and working except for Copious Dogs. No error message, nothing. It just doesn't even register to forge, which is really odd.