Prussian: 6 Guns, 4 officers, 12-14 NCOs, 2 buglers, 6 Obergefreite, 9 Gefreite, 108-114 gunners, 1 medical orderly, 2 saddlers, 4 train soldiers. I don't have numbers on horses, but each battery would also have had 6 ammo wagons and 3 supply wagons. IX, X, XI Corps used former Austrian, Hanovarian, and Hessian wagons captured in 1866.
Bavarian:6 Guns, the source I'm looking at does not have solid numbers for Bavarian field batteries.
Saxon: 6 Guns in iron carriages, 4 officers, 1 Porterpeejunker, 5 artificers, 12 NCOs, 1 bugler, 12 Gefreite, 77 Gunners, 9 riding horses, 28 draught horses.
Baden: Adopted Prussian Organization circa April 1865, gun carriages painted olive green from 1868.
Wuerttemberg: 6 Guns (I'm sensing a theme), 4 officers, 4 artificers, 1 clerk, 3 buglers, 8 NCOs, 68 Gunners, 51 drivers, 1 medical officer, 2 farriers, 1 saddler, 1 wainwright, 1 fitter, 1 dressing carrier, 5 officers orderlies, 13 officers mounts, 54 saddle horses, 96 draught horses.
Source: Stein & Bauer, Franco-Prussian War 1870/71: Uniforms and Equipment of the German Armies.